Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu vu » hieu va, hieu ve, hieu su
xuc van » duc van, vuc van, xuc ban
luc van » luoc van, luu van, duc van
anh bai » sach bai, danh bat, hinh bai
bai cua » ban cua, dai cua, bai ca
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
vu cam » vu cham, vu cao, va cam
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: thuoc sach y nang x hoi. hieu vu cam ((xuc van) OR (luc van)) anh bai cua tre~.
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang x hoi. hieu vu cam ((xuc van) or (luc van)) anh bai cua tre*.