Perhaps you should try some spelling variations:
chinh doanh » kinh doanh
hieu quang » thieu quang, hieu qua, diep quang
hieu quan » hieu qua, lieu quan, thien quan
luan hang » luan nang, luan hung, luan tang
cong than » cong thanh, cong thang, cong tan
than phan » thanh phan, toan phan, thanh pham
luan han » luan hoan, luan phan, luan van
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu quang) or (hieu quan)) - chinh doanh ((luan hang) OR (luan han)) cong than phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu quang) OR (hieu quan)) - chinh doanh ((luan hang) OR (luan han)) cong than phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu quang) or (hieu quan)) - chinh doanh ((luan hang) OR (luan han)) cong than phan cac".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu quang) or (hieu quan)) - chinh doanh ((luan hang) OR (luan han)) cong than phan cac*.