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id="gs_md_err" style="display:none">Hệ thống không thể thực hiện thao tác ngay bây giờ. Hãy thử lại sau.</div><div id="gs_md_s"></div><div data-h="0" class="gs_md_wnw gs_md_ds gs_md_wmw"><div id="gs_cit" class="gs_md_d gs_md_ds gs_ttzi" role="dialog" tabindex="-1" aria-labelledby="gs_cit-t" data-cid="gs_citd" data-wfc="gs_cit-x"><div class="gs_md_hdr"><a href="javascript:void(0)" id="gs_cit-x" role="button" aria-label="Hủy" data-mdx="gs_cit" class="gs_btnCLS gs_md_x gs_md_hdr_c gs_in_ib gs_btn_lrge"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl"></span></a><h2 id="gs_cit-t" class="gs_md_hdr_t">Trích dẫn</h2><div class="gs_md_hdr_b"></div></div><div id="gs_cit-bdy" class="gs_md_bdy"><style>#gs_cit{width:520px;max-width:80%;}.gs_el_ph #gs_cit{width:100%;max-width:100%;}#gs_citt table{width:100%;margin-top:-8px;}#gs_citt td,#gs_citt th{vertical-align:top;padding:8px 0;}#gs_citt th{text-align:right;font-weight:normal;color:#777;padding-right:16px;white-space:nowrap;-ms-user-select:none;user-select:none;}#gs_citi{margin:16px 0 0 0;text-align:center;}.gs_el_ph #gs_citi{margin:16px 0 8px 0;}.gs_citi{margin-right:16px;white-space:nowrap;padding:7px 0 5px 0;}.gs_citi:first-child{margin-left:16px;}</style><div id="gs_citd" aria-live="assertive" data-u="/scholar?scila={id}&output=cite&scirp={p}&hl=vi"></div></div></div></div><div data-h="0" class="gs_md_wnw gs_md_ds gs_md_wmw"><div id="gs_asd" class="gs_md_d gs_md_ds gs_ttzi" role="dialog" tabindex="-1" aria-labelledby="gs_asd-t" data-ifc="gs_asd_q" data-wfc="gs_asd-x"><div class="gs_md_hdr"><a href="javascript:void(0)" id="gs_asd-x" role="button" aria-label="Hủy" data-mdx="gs_asd" class="gs_btnCLS gs_md_x gs_md_hdr_c gs_in_ib gs_btn_lrge"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl"></span></a><h2 id="gs_asd-t" class="gs_md_hdr_t">Tìm kiếm nâng cao</h2><div class="gs_md_hdr_b"><button type="button" id="gs_asd_psb" aria-label="Tìm kiếm" class="gs_btnG gs_in_ib gs_btn_act gs_btn_half gs_btn_lsb"><span class="gs_wr"><span class="gs_ico"></span><span class="gs_lbl"></span></span></button></div></div><div id="gs_asd-bdy" class="gs_md_bdy"><style>#gs_asd{width:80%;max-width:552px;}.gs_el_ph #gs_asd{width:100%;max-width:100%;}#gs_asd_frm{margin-top:-6px;}.gs_el_tc #gs_asd_frm{margin-top:-8px;}.gs_asd_tr{clear:both;}.gs_el_tc .gs_asd_tr{padding:8px 0;}.gs_el_tc .gs_asd_tr:first-child{padding-bottom:0;}.gs_asd_dt{float:left;width:190px;padding:6px 2px 2px;}.gs_el_tc .gs_asd_dt{float:none;width:auto;padding:0 0 4px 0;}.gs_asd_dd{margin-left:194px;padding:2px;}.gs_el_tc .gs_asd_dd{margin-left:0;padding:0;}.gs_asd_yri .gs_in_txt{width:48px;}.gs_el_ph #gs_asd input,.gs_el_ph #gs_asd label{-webkit-tap-highlight-color:rgba(0,0,0,0);}.gs_asd_occtr{padding:5px 0;}.gs_el_tc .gs_asd_occtr{padding:0;}</style><form id="gs_asd_frm" class="gs_scl" action="/scholar"><div class="gs_asd_tr"><div class="gs_asd_dt" id="gs_asd_dt_t"><b>Tìm bài viết</b></div></div><div class="gs_asd_tr"><div class="gs_asd_dt"><label for="gs_asd_q">có <b>tất cả</b> các từ</label></div><div class="gs_asd_dd"><div class="gs_in_txtw gs_in_txtm gs_in_txtb"><input type="text" class="gs_in_txt" name="as_q" value="" id="gs_asd_q" autocapitalize="off"><div class="gs_in_txts"></div></div></div></div><div class="gs_asd_tr"><div class="gs_asd_dt"><label for="gs_asd_epq">có <b>cụm từ chính xác</b></label></div><div class="gs_asd_dd"><div class="gs_in_txtw gs_in_txtm gs_in_txtb"><input type="text" class="gs_in_txt" name="as_epq" value="" id="gs_asd_epq" autocapitalize="off"><div class="gs_in_txts"></div></div></div></div><div class="gs_asd_tr"><div class="gs_asd_dt"><label for="gs_asd_oq">có <b>ít nhất một</b> trong các từ</label></div><div class="gs_asd_dd"><div class="gs_in_txtw gs_in_txtm gs_in_txtb"><input type="text" class="gs_in_txt" name="as_oq" value="" id="gs_asd_oq" autocapitalize="off"><div class="gs_in_txts"></div></div></div></div><div class="gs_asd_tr"><div class="gs_asd_dt"><label for="gs_asd_eq"><b>không có</b> các từ</label></div><div class="gs_asd_dd"><div class="gs_in_txtw gs_in_txtm gs_in_txtb"><input type="text" class="gs_in_txt" name="as_eq" value="" id="gs_asd_eq" autocapitalize="off"><div class="gs_in_txts"></div></div></div></div><div class="gs_asd_tr"><div class="gs_asd_dt"><label for="gs_asd_occt">nơi xuất hiện các từ của tôi</label></div><div class="gs_asd_dd"><div class="gs_asd_occtr"><span class="gs_in_ra" onclick="void(0)"><input type="radio" name="as_occt" value="any" id="gs_asd_occt_a" checked><label for="gs_asd_occt_a">bất cứ nơi nào trong bài viết</label><span class="gs_chk"></span><span class="gs_cbx"></span></span></div><div class="gs_asd_occtr"><span class="gs_in_ra" onclick="void(0)"><input type="radio" name="as_occt" value="title" id="gs_asd_occt_t"><label for="gs_asd_occt_t">trong tiêu đề bài viết</label><span class="gs_chk"></span><span class="gs_cbx"></span></span></div></div></div><div class="gs_asd_tr"><div class="gs_asd_dt"><label for="gs_asd_sau">Trả về các bài viết <b>được viết</b> bởi</label></div><div class="gs_asd_dd"><div class="gs_in_txtw gs_in_txtm gs_in_txtb"><input type="text" class="gs_in_txt" name="as_sauthors" value="" id="gs_asd_sau" autocapitalize="off"><div class="gs_in_txts"></div></div><div>ví dụ: <i>"PJ Hayes"</i> hoặc <i>McCarthy</i></div></div></div><div class="gs_asd_tr"><div class="gs_asd_dt"><label for="gs_asd_pub">Trả về các bài viết <b>được xuất bản</b> trong</label></div><div class="gs_asd_dd"><div class="gs_in_txtw gs_in_txtm gs_in_txtb"><input type="text" class="gs_in_txt" name="as_publication" value="" id="gs_asd_pub" autocapitalize="off"><div class="gs_in_txts"></div></div><div>ví dụ: <i>J Biol Chem</i> hoặc <i>Nature</i></div></div></div><div class="gs_asd_tr"><div class="gs_asd_dt"><label for="gs_asd_ylo">Trả về các bài viết <b>đề ngày</b> trong khoảng</label></div><div class="gs_asd_dd"><div class="gs_asd_yri"><div class="gs_in_txtw gs_in_txtm"><input type="text" class="gs_in_txt" name="as_ylo" value="" id="gs_asd_ylo" size="4" maxlength="4" autocapitalize="off" pattern="[0-9]*"><div class="gs_in_txts"></div></div> — <div class="gs_in_txtw gs_in_txtm"><input type="text" class="gs_in_txt" name="as_yhi" value="" id="gs_asd_yhi" size="4" maxlength="4" autocapitalize="off" pattern="[0-9]*"><div class="gs_in_txts"></div></div></div><div>ví dụ: <i>1996</i></div></div></div><input type=hidden name="hl" value="vi"><input type=hidden name="as_sdt" value="0,5"><input type=hidden name="scilib" value="6"></form></div></div></div><div data-h="800" class="gs_md_wnw gs_md_ds gs_md_wmw"><div id="gs_md_cita-d" class="gs_md_d gs_md_ds gs_ttzi" role="dialog" tabindex="-1" aria-labelledby="gs_md_cita-d-t" data-cid="gs_md_cita-l" data-wfc="gs_md_cita-d-x"><div class="gs_md_hdr"><a href="javascript:void(0)" id="gs_md_cita-d-x" role="button" aria-label="Hủy" data-mdx="gs_md_cita-d" class="gs_btnCLS gs_md_x gs_md_hdr_c gs_in_ib gs_btn_lrge"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl"></span></a><h2 id="gs_md_cita-d-t" class="gs_md_hdr_t"></h2><div class="gs_md_hdr_b"><button type="button" id="gs_md_cita-b-save" aria-label="Lưu" class="gs_btnDNW gs_in_ib gs_btn_act gs_btn_half gs_btn_lsb"><span class="gs_wr"><span class="gs_ico"></span><span class="gs_lbl"></span></span></button></div></div><div id="gs_md_cita-d-bdy" class="gs_md_bdy"><style>#gs_md_cita-d{width:90%;max-width:1000px;}.gs_el_ph #gs_md_cita-d{width:100%;max-width:none;}#gs_md_cita-d .gs_md_prg{min-height:600px;}</style><div id="gs_md_cita-l" aria-live="assertive"></div></div></div></div><div data-h="0" class="gs_md_wnw gs_md_ds"><div id="gs_ead" class="gs_md_d gs_md_ds gs_ttzi" role="dialog" tabindex="-1" aria-labelledby="gs_ead-t" data-ifc="gs_ead_export" data-wfc="gs_ead-x"><div class="gs_md_hdr"><a href="javascript:void(0)" id="gs_ead-x" role="button" aria-label="Hủy" data-mdx="gs_ead" class="gs_btnCLS gs_md_x gs_md_hdr_c gs_in_ib gs_btn_lrge"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl"></span></a><h2 id="gs_ead-t" class="gs_md_hdr_t">Xuất bài viết</h2><div class="gs_md_hdr_b"></div></div><div id="gs_ead-bdy" class="gs_md_bdy"><style>.gs_ead_r{margin:0 0 8px 0;}.gs_el_tc .gs_ead_r{margin:0;}.gs_el_tc .gs_ead_r:first-child{margin-top:-8px;}</style><form id="gs_ead_f" action="" method="POST" data-show="true"><div><div class="gs_ead_r"><span class="gs_in_ra" onclick="void(0)"><input type="radio" name="s" value="" id="gs_ead_r0" checked><label for="gs_ead_r0">Xuất các bài viết trên trang này</label><span class="gs_chk"></span><span class="gs_cbx"></span></span></div><div class="gs_ead_r"><span class="gs_in_ra" onclick="void(0)"><input type="radio" name="s" value="" id="gs_ead_r1"><label for="gs_ead_r1">Xuất tất cả bài viết có nhãn này</label><span class="gs_chk"></span><span class="gs_cbx"></span></span></div></div><div class="gs_md_btns"><button type="submit" id="gs_ead_export" class=" gs_btn_act gs_btn_lrge gs_btn_lsu"><span class="gs_wr"><span class="gs_lbl">Xuất</span></span></button></div><input type="hidden" name="export_selected_btn"></form></div></div></div><div data-h="0" class="gs_md_wnw gs_md_ds"><div id="gs_aad" class="gs_md_d gs_md_ds gs_ttzi" role="dialog" tabindex="-1" aria-labelledby="gs_aad-t" data-ifc="gs_aad_archive" data-wfc="gs_aad-x"><div class="gs_md_hdr"><a href="javascript:void(0)" id="gs_aad-x" role="button" aria-label="Hủy" data-mdx="gs_aad" class="gs_btnCLS gs_md_x gs_md_hdr_c gs_in_ib gs_btn_lrge"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl"></span></a><h2 id="gs_aad-t" class="gs_md_hdr_t">Lưu trữ bài viết</h2><div class="gs_md_hdr_b"></div></div><div id="gs_aad-bdy" class="gs_md_bdy"><style>.gs_aad_r{margin:0 0 8px 0;}.gs_el_tc .gs_aad_r{margin:0;}.gs_el_tc .gs_aad_r:first-child{margin-top:-8px;}</style><form id="gs_aad_f" class="gs_ajax_frm" action="/citations?update_op=change_labels&citilm=1&xsrf=&hl=vi" method="POST"><input type="hidden" name="label_ids_to_remove" value="6"><div><div class="gs_aad_r"><span class="gs_in_ra" onclick="void(0)"><input type="radio" name="s" value="" id="gs_aad_r0" checked><label for="gs_aad_r0">Lưu trữ các bài viết trên trang này</label><span class="gs_chk"></span><span class="gs_cbx"></span></span></div><div class="gs_aad_r"><span class="gs_in_ra" onclick="void(0)"><input type="radio" name="s" value="" id="gs_aad_r1"><label for="gs_aad_r1">Lưu trữ tất cả bài viết trong danh sách đọc</label><span class="gs_chk"></span><span class="gs_cbx"></span></span></div></div><div class="gs_md_btns"><button type="submit" id="gs_aad_archive" class=" gs_btn_act gs_btn_lrge gs_btn_lsu"><span class="gs_wr"><span class="gs_lbl">Lưu trữ</span></span></button></div></form></div></div></div><div data-h="367" class="gs_md_wnw gs_md_ds gs_md_wmw"><div id="gs_md_albl-d" class="gs_md_d gs_md_ds gs_ttzi" role="dialog" tabindex="-1" aria-labelledby="gs_md_albl-d-t" data-wfc="gs_md_albl-d-x"><div class="gs_md_hdr"><a href="javascript:void(0)" id="gs_md_albl-d-x" role="button" aria-label="Hủy" data-mdx="gs_md_albl-d" class="gs_btnCLS gs_md_x gs_md_hdr_c gs_in_ib gs_btn_lrge"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl"></span></a><h2 id="gs_md_albl-d-t" class="gs_md_hdr_t">Chỉnh sửa nhãn</h2><div class="gs_md_hdr_b"></div></div><div id="gs_md_albl-d-bdy" class="gs_md_bdy"></div><div class="gs_md_ftr"><div class="gs_lbl_btns"><button type="button" id="gs_lbd_apl" class=" gs_btn_act gs_btn_lrge"><span class="gs_wr"><span class="gs_lbl">Xong</span></span><span class="gs_bs"></span></button></div></div></div></div><div id="gs_hdr_drw" class="gs_md_ulr gs_md_ds" role="dialog" tabindex="-1" data-shd="gs_hdr_drs" data-wfc="gs_hdr_drw_mnu" data-cfc="gs_hdr_mnu"><div id="gs_hdr_drw_in"><div id="gs_hdr_drw_top"><a href="javascript:void(0)" id="gs_hdr_drw_mnu" role="button" aria-controls="gs_hdr_drw" aria-label="T.chọn" class="gs_btnMNT gs_in_ib gs_btn_lrge"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl"></span></a><a id="gs_hdr_drw_lgo" href="/schhp?hl=vi&as_sdt=0,5" aria-label="Trang chủ"></a></div><div><div class="gs_hdr_drw_sec"><a href="/scholar?as_sdt=0,5&hl=vi" role="menuitem" class=" gs_in_ib gs_md_li gs_md_lix gs_in_gray"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl">Bài viết</span></a><a href="/citations?view_op=search_authors&mauthors=&hl=vi&oi=drw" role="menuitem" class=" gs_in_ib gs_md_li gs_md_lix gs_in_gray"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl">Hồ sơ</span></a></div><div class="gs_hdr_drw_sec"><a href="/citations?hl=vi" role="menuitem" class="gs_btnPRO gs_in_ib gs_md_li gs_md_lix gs_in_gray"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl">Hồ sơ của tôi</span></a><a href="/scholar?scilib=1&hl=vi&as_sdt=0,5" role="menuitem" class="gs_btnL gs_in_ib gs_md_li gs_md_lix gs_in_gray"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl">Thư viện của tôi</span></a><a href="/scholar_alerts?view_op=list_alerts&hl=vi" role="menuitem" class="gs_btnM gs_in_ib gs_md_li gs_md_lix gs_in_gray"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl">Thông báo</span></a><a href="/citations?view_op=metrics_intro&hl=vi" role="menuitem" class="gs_btnJ gs_in_ib gs_md_li gs_md_lix gs_in_gray"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl">Số liệu</span></a></div><div class="gs_hdr_drw_sec"><a href="javascript:void(0)" id="gs_res_drw_adv" role="menuitem" class="gs_btnADV gs_in_ib gs_md_li gs_md_lix gs_in_gray"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl">Tìm kiếm nâng cao</span></a></div><div class="gs_hdr_drw_sec"><a href="/scholar_settings?hl=vi&as_sdt=0,5&scilib=6" role="menuitem" class="gs_btnP gs_in_ib gs_md_li gs_md_lix gs_in_gray"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl">Cài đặt</span></a></div></div><div id="gs_hdr_drw_bot" class="gs_hdr_drw_sec"><a href="https://accounts.google.com/Login?hl=vi&continue=https://scholar.google.com.tw/scholar%3Fscilib%3D6%26hl%3Dvi%26as_sdt%3D0,5" class=" gs_in_ib gs_md_li gs_md_lix gs_in_gray"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl">Đăng nhập</span></a></div></div></div><div id="gs_hdr" role="banner"><a href="javascript:void(0)" id="gs_hdr_mnu" role="button" aria-controls="gs_hdr_drw" class="gs_btnMNT gs_in_ib gs_btn_lrge"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl"></span></a><a id="gs_hdr_lgo" class="gs_hdr_dso" href="/schhp?hl=vi&as_sdt=0,5" aria-label="Trang chủ"></a><div id="gs_hdr_md"><div id="gs_hdr_srch"><form id="gs_hdr_frm" action="/scholar"><input type=hidden name="hl" value="vi"><input type=hidden name="as_sdt" value="0,5"><input type=hidden name="scilib" value="6"><div class="gs_in_txtw gs_in_txtb"><input type="text" class="gs_in_txt" name="q" value="" id="gs_hdr_tsi" size="50" maxlength="2048" autocapitalize="off" aria-label="Tìm kiếm"><div class="gs_in_txts"></div></div><span id="gs_hdr_tsc"><span class="gs_ico gs_ico_X"></span></span><button type="submit" id="gs_hdr_tsb" name="btnG" aria-label="Tìm kiếm" class="gs_btnG gs_in_ib gs_btn_act gs_btn_half gs_btn_lsb"><span class="gs_wr"><span class="gs_ico"></span><span class="gs_lbl"></span></span></button></form></div></div><div id="gs_hdr_act"><a id="gs_hdr_act_s" href="https://accounts.google.com/Login?hl=vi&continue=https://scholar.google.com.tw/scholar%3Fscilib%3D6%26hl%3Dvi%26as_sdt%3D0,5">Đăng nhập</a></div></div><style>#gs_alrt{position:fixed;bottom:48px;left:16px;max-width:384px;z-index:1250;display:flex;justify-content:space-between;align-items:center;font-size:13px;line-height:16px;color:#e2e2e2;background:#333;text-align:left;border-radius:3px;box-shadow:0 3px 5px -1px rgba(0,0,0,.2),0 6px 10px 0 rgba(0,0,0,.14),0 1px 18px 0 rgba(0,0,0,.12);visibility:hidden;transform-origin:center;transform:scale(0.8,0.8) translate(0,100%);}.gs_el_ph #gs_alrt{bottom:0;left:0;width:100%;max-width:none;border-radius:0;box-shadow:none;transform:scale(1,1) translate(0,100%);}#gs_alrt.gs_vis{visibility:visible;transform:scale(1,1) translate(0,0);}#gs_alrt.gs_anm{transition:transform .067s cubic-bezier(.4,0,1,1),visibility 0s .067s;}#gs_alrt.gs_vis.gs_anm{transition:transform .067s cubic-bezier(0,0,.2,1);}.gs_el_ph #gs_alrt.gs_anm{transition:transform .084s cubic-bezier(.4,0,1,1),visibility 0s .084s;}.gs_el_ph #gs_alrt.gs_vis.gs_anm{transition:transform .1s cubic-bezier(0,0,.2,1);}#gs_alrt_m{display:block;padding:16px;}#gs_alrt_l{display:block;padding:8px;margin:0 8px 0 -8px;border-radius:3px;color:#fcc934;text-transform:uppercase;text-decoration:none;}#gs_alrt_l:hover{background-color:rgba(255,255,255,.05)}#gs_alrt_l:active{background-color:rgba(255,255,255,.1)}#gs_alrt_l:empty{display:none}#gs_alrt_m a{padding:8px 0;color:#e2e2e2;text-decoration:underline;}#gs_alrt_m a:active{color:#f6aea9}</style><form action="" method="post" id="gs_alrt"><span id="gs_alrt_m"></span><span id="gs_alrt_h"></span><a id="gs_alrt_l" href="javascript:void(0)" class="gs_fm_s" data-fm="gs_alrt"></a></form><div id="gs_ab" class=""><div id="gs_ab_ico" class="gs_btnGSL"><span class="gs_ico"></span></div><div id="gs_ab_ttl"><div class="gs_ab_mdw"><span class="gs_nph gs_nta">Thư viện của tôi</span><div class="gs_oph gs_ota"><div id="gs_res_ab_tmn-r" class="gs_md_r gs_md_rmb gs_md_rmbl"><button type="button" id="gs_res_ab_tmn-b" aria-controls="gs_res_ab_tmn-d" aria-haspopup="true" ontouchstart="gs_evt_dsp(event)" class=" gs_in_se gs_btn_mnu gs_btn_flat gs_btn_lrge gs_btn_half gs_btn_mini gs_btn_lsu gs_press gs_md_tb"><span class="gs_wr"><span class="gs_lbl" id="gs_ab_ttll">Danh sách đọc</span><span class="gs_icm"></span></span></button><div id="gs_res_ab_tmn-d" class="gs_md_d gs_md_ds gs_md_ulr" role="menu" tabindex="-1"><div class="gs_res_ab_dd_bdy"><div class="gs_res_ab_dd_sec"><a href="/scholar?scilib=1&hl=vi&as_sdt=0,5" class="gs_md_li" role="menuitemradio" tabindex="-1">Tất cả bài viết<span class="gs_notf"></span></a><a href="/scholar?scilib=6&hl=vi&as_sdt=0,5" class="gs_md_li gs_res_ab_sel" aria-checked="true" role="menuitemradio" tabindex="-1">Danh sách đọc<span class="gs_notf"></span></a><a href="/scholar?scilib=5&hl=vi&as_sdt=0,5" class="gs_md_li" role="menuitemradio" tabindex="-1">Thùng rác<span class="gs_notf"></span></a><a href="/citations?view_op=manage_labels&hl=vi&oi=srp" class="gs_md_li" role="menuitemradio" tabindex="-1">Quản lý nhãn...<span class="gs_notf"></span></a></div></div></div></div></div></div></div><div id="gs_ab_md"><div class="gs_ab_mdw"></div></div><div id="gs_ab_btns"><a href="/citations?hl=vi" class="gs_btnPRO gs_in_ib gs_in_gray gs_nph gs_nta"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl">Hồ sơ của tôi</span></a><a href="/scholar?scilib=1&hl=vi&as_sdt=0,5" class="gs_btnL gs_in_ib gs_in_gray gs_nph gs_nta gs_mylib"><span class="gs_ico"></span><span class="gs_ia_notf"></span><span class="gs_lbl">Thư viện của tôi</span></a></div></div><div id="gs_bdy"><div id="gs_bdy_sb" role="navigation"><div id="gs_bdy_sb_in"></div></div><div id="gs_bdy_ccl" role="main"><style>#gs_captcha_ccl{max-width:680px;margin:21px 0;}.gs_el_sm #gs_captcha_ccl{margin:13px 0;}#gs_captcha_ccl h1{font-size:16px;line-height:24px;font-weight:normal;padding:0 0 16px 0;}</style><div id="gs_captcha_ccl"><script>function gs_captcha_cb(){grecaptcha.render("gs_captcha_c",{"sitekey":"6LfFDwUTAAAAAIyC8IeC3aGLqVpvrB6ZpkfmAibj","callback":function(){document.getElementById("gs_captcha_f").submit()}});};</script><form method="get" id="gs_captcha_f"><h1>Hãy thể hiện rằng bạn không phải là rô-bốt</h1><div id="gs_captcha_c"></div><script src="//www.google.com/recaptcha/api.js?onload=gs_captcha_cb&render=explicit&hl=vi" async defer></script><input type=hidden name="hl" value="vi"><input type=hidden name="as_sdt" value="0,5"><input type=hidden name="scilib" value="6"></form><noscript><div class="gs_alrt"><div>Rất tiếc, chúng tôi không thể xác minh rằng bạn không phải là rô-bốt khi JavaScript bị tắt.</div><div>Vui lòng <a href="//support.google.com/answer/23852?hl=vi">bật JavaScript</a> trong trình duyệt của bạn và tải lại trang này.</div></div></noscript></div></div></div><div id="gs_ftr_sp" role="presentation"></div><div id="gs_ftr" class="gs_md_rmb" role="contentinfo"><div id="gs_ftr_rt"><a href="//www.google.com.tw/intl/vi/policies/privacy/">Quyền riêng tư</a><a href="//www.google.com.tw/intl/vi/policies/terms/">Điều khoản</a><a href="javascript:void(0)" ontouchstart="gs_evt_dsp(event)" role="button" aria-controls="gs_ftr_mnu" aria-haspopup="true" class="gs_press gs_md_tb">Trợ giúp</a></div><div id="gs_ftr_mnu" class="gs_md_d gs_md_ds gs_ttzi gs_md_ulr" role="menu" tabindex="-1"><a role="menuitem" href="/intl/vi/scholar/about.html" tabindex="-1" class="gs_md_li">Giới thiệu về Scholar</a><a role="menuitem" href="//support.google.com/websearch?p=scholar_dsa&hl=vi" tabindex="-1" class="gs_md_li">Trợ giúp về Tìm kiếm</a></div></div></div></body></html>