Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chieu sang, chieu xanh
trung dap » trung cap, trung dai, trung dam
dung cong » dung trong
dap dung » ap dung, dan dung, dap ung
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: ho ((chieu sach) or (chiet tach)) - thanh trung dap dung cong ((dan than) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - thanh trung dap dung cong ((dan than) OR (dan chan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chiet tach)) - thanh trung dap dung cong ((dan than) or (dan chan)) cau*.