Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, trung cap
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
cong tac » cong ty
tren cau » tren ca, tren cay, trinh cau
tren tau » tren thuc, tren may, tren dat

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - thanh trung cua dong cong tac ((tren cau) or (tren tau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh trung cua dong cong tac ((tren cau) OR (tren tau)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh trung cua dong cong tac ((tren cau) or (tren tau))*.