Perhaps you should try some spelling variations:
khong trong » khoang trong, thong trong, phong trong
doanh doanh » toan doanh, doanh hoan, doanh thanh
hanh doanh » hang doanh, chinh doanh, kinh doanh
thien quan » trien quang, lien quan, thien van
hieu quan » hieu qua, lieu quan, lien quan
cua khong » hua khong, cua phuong, cua thuong
trong van » trong cac
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 (thien quan)) - ((hanh doanh) OR (doanh doanh)) cua khong trong van han tai~.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu quan) or (thien quan)) - ((hanh doanh) or (doanh doanh)) cua khong trong van han tai*.