Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
tranh dung » trinh dung, tran dung, thanh dung
doi chieu » doc hieu, doi chi, mot chieu
thanh lap » thanh san, phan lap, thanh hai
ho chieu » theo chieu, hoc thieu, mot chieu
dung ban » dung san, dong ban, dung bai
dung dan » dung dat, dung san, tung dan

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 (doi chieu)) sach - canh tranh dung phuong ((dung ban) OR (dung dan)) thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - canh tranh dung phuong ((dung ban) OR (dung dan)) thanh lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) sach - canh tranh dung phuong ((dung ban) OR (dung dan)) thanh lap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - canh tranh dung phuong ((dung ban) OR (dung dan)) thanh lap*.