Perhaps you should try some spelling variations:
chinh doanh » kinh doanh
doanh luan » doanh nhan
hieu lang » chieu sang, hieu quang, nhieu tang
luan dang » luan nang, luan danh, luan dong
dang cong » dung cong
cong tap » cuong tap, cong tac, cong tan
tap phan » tai phan, cap phan, tap pham
phan dau » phan tu, hang dau

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) or (nhiet dong)) - chinh doanh luan dang cong tap phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (nhiet dong)) - chinh doanh luan dang cong tap phan dau.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (nhiet dong)) - chinh doanh luan dang cong tap phan dau*.