Perhaps you should try some spelling variations:
chiet tach » chieu sach
thanh dung » thanh duong, thanh tung, thanh hung
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
ho chiet » ho chieu, ho thiet, hoc thiet
dung cua » dung luan, dung cho
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 chiet tach - thanh dung cua nhung cong ((dan than) or (van than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh dung cua nhung cong ((dan than) OR (van than)) cau.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh dung cua nhung cong ((dan than) or (van than)) cau*.