Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tay tang » tay lang, tay trung, tay quang
tang cho » trang cho, sang cho, hang cho
van hanh » van thanh, ban hanh, van anh
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cac cuoc » ca cuoc, cac quoc, can cuoc
te sach » toc sach
cua cay » cua cac
cac luc » cau luc, coc luc, cac luat
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
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 tay tang cho hoc. hieu ve ((((cac luc) OR (cac cuoc))) or (cac nuoc)) van hanh vi cua cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tay tang cho hoc. hieu ve ((((cac luc) OR (cac cuoc))) OR (cac nuoc)) van hanh vi cua cay*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tay tang cho hoc. hieu ve ((((cac luc) OR (cac cuoc))) or (cac nuoc)) van hanh vi cua cay*".