Perhaps you should try some spelling variations:
doanh nang » doanh sang, doanh nhung, doanh quang
thuong han » thuong mai, thuong va, thuong gap
thuong dam » thuong mai, huong dan, truong dai
hieu lang » chieu sang, hieu quang, nhieu tang
hoc hieu » hoc thieu, hoc hien, doc hieu
luc cong » luoc cong, duc cong, luc dong
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - doanh nang luc cong ((thuong han) or (thuong dam)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - doanh nang luc cong ((thuong han) OR (thuong dam)) than cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - doanh nang luc cong ((thuong han) or (thuong dam)) than cau*.