Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
hieu ve » hieu va, hieu van
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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: ((te sach) OR (hoc sach)) ky nang x hoi. hieu ve cac ((luc van) OR (duc van)) hanh tai cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) ky nang x hoi. hieu ve cac ((luc van) or (duc van)) hanh tai cua tre*.