Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chieu sang, chieu xanh
dung cong » dung trong
thanh lap » thanh san, phan lap, thanh hai
trung va » truong va, trang va, trung ha
cong ban » cong bang, cong san, cong tan
khan cap » khan ap, than cap, khoan cam
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (chiet tach)) - thanh trung va dung cong ban ((khan cap) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - thanh trung va dung cong ban ((khan cap) OR (thanh lap)).
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chiet tach)) - thanh trung va dung cong ban ((khan cap) or (thanh lap))*.