Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cac luc » cau luc, coc luc, cac cuoc
te sach » toc sach
cho hoc » co hoc, khoa hoc
ty hang » ly hang, ty xang, thi hang
ly nang » ky nang, ly hang, ly vang
cua cau » cua cac, cua chu, cua cay
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ly nang) or (ty hang)) cho hoc. lieu va ((cac luc) OR (cac nuoc)) van hanh vi cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ly nang) OR (ty hang)) cho hoc. lieu va ((cac luc) OR (cac nuoc)) van hanh vi cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ly nang) or (ty hang)) cho hoc. lieu va ((cac luc) OR (cac nuoc)) van hanh vi cua cau*".