Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trung cua » truong cua, trung tuan, trung cap
cua dang » cua cong, cua ban
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - thanh trung cua dang ((cong tan) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh trung cua dang ((cong tan) OR (cong san)) toan cao.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh trung cua dang ((cong tan) or (cong san)) toan cao*.