Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chiet tach, chieu sang, chieu xanh
trung vap » trung cap, trung va, trung van
dung cong » dung trong
vap dung » van dung, ap dung, va dung
dan than » dan chan, ban than, dan toan
van than » van thanh, van thang, van tuan

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 (chinh sach)) - thanh trung vap dung cong ((dan than) or (van than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chinh sach)) - thanh trung vap dung cong ((dan than) OR (van than)) cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chinh sach)) - thanh trung vap dung cong ((dan than) or (van than)) cau*.