Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, tu cach
te sach » toc sach
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
ve cac » va cac, vien cac
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang ((ma hoa) OR (dai hoi)). hieu ve cac xuc va hanh vi cua vat~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang ((ma hoa) or (dai hoi)). hieu ve cac xuc va hanh vi cua vat*.