Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
khong cong » khong cang, chong cong, khong con
thong cong » trong cong, tong cong, thong thong
tieu lang » hieu lang, tien lang, tieu dung
doanh cua » doanh luan
van van » van ban, tan van, san van
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: theo tieu lang - hanh doanh cua ((khong cong) OR (thong cong)) van van tai~.
• Adding a wildcard symbol may retrieve word variants: theo tieu lang - hanh doanh cua ((khong cong) or (thong cong)) van van tai*.