Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chieu sang, chieu xanh
trung cao » truong cao, trung cap, trung co
ung cong » dung cong, luong cong, duong cong
cong ban » cong bang, cong san, cong tan
than cau » toan cau, phan cau, than cap
thanh ca » thanh cha, thanh cac, thanh ha
cao ung » cao dung, cac ung, cho ung

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) or (chiet tach)) - thanh trung cao ung cong ban ((than cau) or (thanh ca))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - thanh trung cao ung cong ban ((than cau) OR (thanh ca)).
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chiet tach)) - thanh trung cao ung cong ban ((than cau) or (thanh ca))*.