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
thanh cac » hanh cac, thanh bac, thanh ca
ung cong » dung cong, luong cong, duong cong
cong ban » cong bang, cong san, cong tan
than cau » toan cau, phan cau, than cap
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 cac))~.
• 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 cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - thanh trung cao ung cong ban ((than cau) or (thanh cac))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - thanh trung cao ung cong ban ((than cau) or (thanh cac))*.