Perhaps you should try some spelling variations:
khong cong » khong cang, chong cong, khong con
hanh doanh » hang doanh, chinh doanh, doanh doanh
thong cong » trong cong, tong cong, thong thong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
van hang » van khang, van hoang, van thang
hang tai » hang va, dung tai

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 cua ((khong cong) OR (thong cong)) van hang tai~.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh doanh cua ((khong cong) or (thong cong)) van hang tai*.