Perhaps you should try some spelling variations:
trien quang » tran quang, tuyen quang, dien quang
hang doanh » hanh doanh, nhung doanh, van doanh
hieu quan » hieu qua, lieu quan, thien quan
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
thong van » trong van, thong va, thong quan
van han » van hanh, van phan, van nhan
han tai » hang tai, nhan tai, van tai

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

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