Perhaps you should try some spelling variations:
doanh hoan » doanh doanh, doanh khoa, doanh nhan
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
cong cong » cong dong, trong cong, dung cong
tong cong » trong cong, dung cong, dang cong
hoan cua » hoa cua, toan cua, han cua
van nhan » van phan, van thanh, danh nhan
nhan tai » hang tai, van tai, toan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - doanh hoan cua ((cong cong) or (tong cong)) van nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - doanh hoan cua ((cong cong) OR (tong cong)) van nhan tai.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - doanh hoan cua ((cong cong) or (tong cong)) van nhan tai*.