Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
danh hai » dang hai, lanh hai, manh hai
cau tren » cu tren, dau tren, ca tren
su sach » vu sach
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
va danh » va dinh, va dan, va hanh
hai cau » hai chau, hai chu, hai hau
v nang » va nang, vu nang, van nang
tuc va » thuc va, truc va, tuc xa

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: ((su sach) OR (so sach)) v nang xa hoi. hieu van cam tuc va danh hai cau tren~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) v nang xa hoi. hieu van cam tuc va danh hai cau tren*.