Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, khong con
hanh doanh » hang doanh, chinh doanh, doanh doanh
chong cong » cong cong, thong cong, cuong cong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
van nhan » van phan, van thanh, danh nhan
ban nhan » ban than, ban thanh, benh nhan

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