Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
hanh doanh » hang doanh, chinh doanh, kinh doanh
hieu quang » thieu quang, hieu qua, diep quang
hieu quan » hieu qua, lieu quan, thien quan
cua thong » cua thuong, cua khong, cua tong
thong van » trong van, thong va, thong quan
van hang » van khang, van hoang, van thang
hang tai » hang va, dung 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) or (doanh doanh)) cua thong thong van hang tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu quang) OR (hieu quan)) - ((hanh doanh) OR (doanh doanh)) cua thong thong van hang tai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu quang) OR (hieu quan)) - ((hanh doanh) or (doanh doanh)) cua thong thong van hang tai".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu quang) OR (hieu quan)) - ((hanh doanh) or (doanh doanh)) cua thong thong van hang tai*.