Perhaps you should try some spelling variations:
dong hoc » dong co, dong luc
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty dong » tay dong, tu dong, ly dong
hoc hoi » hoc khoi, hoc hoa, hoc noi
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
cua cau » cua chu, cua can, cua cu
ve cac » va cac, vien cac

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 ty dong hoc hoi. hieu ve cac xuc van hanh vi ((cua cau) or (((cua cay) OR (cua cac))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty dong hoc hoi. hieu ve cac xuc van hanh vi ((cua cau) OR (((cua cay) OR (cua cac))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty dong hoc hoi. hieu ve cac xuc van hanh vi ((cua cau) or (((cua cay) OR (cua cac))))*".