Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
cong tac » cong ty
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, luat duoc, lam thuoc
anh thai » anh thi, anh tai, nhanh thai
su triet » su viet, su tien, ve triet
te sach » toc sach
tac hoi » tao hoi, tay hoi, tac hai
van lam » van nam
duoc va » nuoc va, duc va, duoc ma
anh va » hanh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach thu cong tac hoi. hieu van lam duoc va ((anh thai) or (anh va)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu cong tac hoi. hieu van lam duoc va ((anh thai) OR (anh va)) su triet.
• Adding a wildcard symbol may retrieve word variants: te sach thu cong tac hoi. hieu van lam duoc va ((anh thai) or (anh va)) su triet*.