Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
van thanh » ban thanh, van tuan
ho chieu » theo chieu, doi chieu, mot chieu
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) OR (hoc thieu)) 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) OR (hoc thieu)) 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) OR (hoc thieu)) sach - thanh tuong va dung cong ((dan toan) or (van thanh)) cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) sach - thanh tuong va dung cong ((dan toan) or (van thanh)) cao*.