Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu sach » chiet tach, chieu sang, chieu xanh
dung cong » dung trong
van thanh » ban thanh, van tuan
tuong va » truong va, thuong va, luong va
dan toan » van toan, dan than, manh toan
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 (chinh sach)) - thanh tuong va dung cong ((dan toan) or (van thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chinh sach)) - thanh tuong va dung cong ((dan toan) OR (van thanh)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chinh sach)) - thanh tuong va dung cong ((dan toan) or (van thanh)) cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chinh sach)) - thanh tuong va dung cong ((dan toan) or (van thanh)) cao*.