Perhaps you should try some spelling variations:
khong thong » thong thong, khong trong, thong thuong
hanh doanh » hang doanh, chinh doanh, doanh doanh
hieu quang » thieu quang, hieu qua, diep quang
hieu quan » hieu qua, lieu quan, thien quan
cua khong » hua khong, cua phuong, cua thuong
quan hang » quan hoang, quan lang, quan hanh
hang tai » hang va, dung tai
toan » tran

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