Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
cong thanh » dong thanh, cong trinh, cong tan
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
luan cong » luat cong, luong cong, luan chung

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: theo hieu lang - hanh doanh luan cong ((cong ty) OR (cong thanh)) van ban~.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh doanh luan cong ((cong ty) or (cong thanh)) van ban*.