Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
thanh tran » thanh trang, thanh toan, thanh tra
hung cong » nhung cong, hung cuong, phung cong
manh toan » thanh toan, anh tuan, tinh toan
tran van » luan van
van hung » van dung, manh hung, van duong
ban hang » ngan hang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) OR (chieu sang)) - thanh tran van hung cong ((manh toan) or (ban hang)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - thanh tran van hung cong ((manh toan) OR (ban hang)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chieu sang)) - thanh tran van hung cong ((manh toan) or (ban hang)) ban".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (chieu sang)) - thanh tran van hung cong ((manh toan) or (ban hang)) ban*.