Perhaps you should try some spelling variations:
thien van » thi van
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
hieu van » hieu va, lieu va, hieu ve
tu sach » thu sach, te sach, tu cach
vai cua » dai cua, hai cua, lai cua
duc ban » duc tan, duc van, dua ban
lam duc » lam duoc, pham duc, nam duoc
nang xa » nang x, lang xa, nang ma
vu nang » vuc nang, va nang, vu dang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet

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 (su sach)) vu nang xa hoi. ((hieu van) OR (thien van)) lam duc ban hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) vu nang xa hoi. ((hieu van) or (thien van)) lam duc ban hanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) vu nang xa hoi. ((hieu van) or (thien van)) lam duc ban hanh vai cua tre*.