Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
khong thong » thong thong, khong trong, thong thuong
hanh doanh » hang doanh, chinh doanh, kinh doanh
hieu quan » lieu quan, thien quan, lien quan
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.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu quan) OR (hieu qua)) - ((hanh doanh) or (doanh doanh)) cua khong thong van han tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu quan) OR (hieu qua)) - ((hanh doanh) OR (doanh doanh)) cua khong thong van han tai*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu quan) OR (hieu qua)) - ((hanh doanh) or (doanh doanh)) cua khong thong van han tai*".