Perhaps you should try some spelling variations:
thanh trung » thanh tung
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
trung ca » trung cap, truong ca, trung cua
ca nhung » cua nhung, cam nhung, va nhung
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chinh sach) or (chiet tach)) - thanh trung ca nhung cong ((dan than) OR (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chinh sach) OR (chiet tach)) - thanh trung ca nhung cong ((dan than) OR (dan chan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chinh sach) or (chiet tach)) - thanh trung ca nhung cong ((dan than) OR (dan chan)) cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chinh sach) or (chiet tach)) - thanh trung ca nhung cong ((dan than) OR (dan chan)) cau*.