Perhaps you should try some spelling variations:
thien van » thi van
ban thanh » ban hanh, ban hang
thanh tra » thanh toan, thanh hoa
hieu van » hieu va, lieu va, hieu ve
su sach » so sach, vu sach
cua tre » cua te, cua triet, dua tren
lam duc » lam duoc, pham duc, nam duoc
duc ban » duc tan, duc van, dua ban
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang x hoi. ((hieu van) or (thien van)) lam duc ban thanh tra ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. ((hieu van) OR (thien van)) lam duc ban thanh tra ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. ((hieu van) or (thien van)) lam duc ban thanh tra ((cua tre) or (cuu tre))*.