Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thien hach » thien thanh, hien hanh
thanh dung » thanh duong, thanh tung, thanh hung
nang cong » nang song, dang cong, bang cong
tan thong » toan thong, tran thong, tao thong
thong cac » trong cac, phong cach, thong cua
cong tan » cong tac, cong san, cong thanh
va nang » van nang, da nang, cam nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (thien hach)) - thanh dung va nang cong tan thong cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (thien hach)) - thanh dung va nang cong tan thong cac*.