Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
dung quan » dung quang, dung luan, luong quan
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, mot chieu
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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 (toc thieu)) sach - thanh dung quan dung cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (toc thieu)) sach - thanh dung quan dung cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (toc thieu)) sach - thanh dung quan dung cong tan van ban*.