Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
hieu quang » thieu quang, hieu qua, diep quang
hieu quan » hieu qua, lieu quan, thien quan
doanh cua » doanh luan
cua thong » cua thuong, cua khong, cua tong
hang tai » hang va, dung tai
han tai » nhan tai, van tai, toan tai

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 quang) OR (hieu quan)) - hanh doanh cua thong thong quan ((han tai) or (hang tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu quang) OR (hieu quan)) - hanh doanh cua thong thong quan ((han tai) OR (hang tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu quang) OR (hieu quan)) - hanh doanh cua thong thong quan ((han tai) or (hang tai))".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu quang) OR (hieu quan)) - hanh doanh cua thong thong quan ((han tai) or (hang tai))*.