Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
cong cong » cong dong, trong cong, dung cong
doi hieu » doi chieu, doc hieu, doi hien
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - hanh doanh luan ((cong cong) or (thong cong)) van ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh doanh luan ((cong cong) OR (thong cong)) van ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh doanh luan ((cong cong) or (thong cong)) van ((toan cau) or (toan tap))*.