Perhaps you should try some spelling variations:
chinh doanh » kinh doanh
hieu quang » thieu quang, hieu quan, hieu qua
doanh luan » doanh nhan
thong cong » trong cong, thong thong, phong chong
hieu lang » chieu sang, nhieu tang, hieu van
tong cong » trong cong, cong cong, dung cong
tan phan » toan phan, than phan, van phan
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: theo ((hieu lang) or (hieu quang)) - chinh doanh luan ((thong cong) OR (tong cong)) tan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (hieu quang)) - chinh doanh luan ((thong cong) OR (tong cong)) tan phan dau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) or (hieu quang)) - chinh doanh luan ((thong cong) OR (tong cong)) tan phan dau*".