Perhaps you should try some spelling variations:
doanh luan » doanh nhan
luan nhung » luan chung, luan hung, quan nhung
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, mot chieu
anh doanh » hanh doanh, anh danh, doanh doanh
ho chieu » theo chieu, hoc thieu, mot chieu
van tan » van tuan, van ban, van thanh
van tai » von tai, van tuan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - anh doanh luan nhung cong ((van tan) OR (van tai)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) sach - anh doanh luan nhung cong ((van tan) OR (van tai)) cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - anh doanh luan nhung cong ((van tan) OR (van tai)) cau*.