Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
hanh doanh » hang doanh, chinh doanh, kinh doanh
khong song » khong dong, khong mong, khong xuong
hieu lang » chieu sang, hieu quang, nhieu tang
cua khong » hua khong, cua phuong, cua thuong
song van » hoang van, trong van, duong van
van han » van hanh, van phan, van nhan
han tap » han tai, toan tap, nhan 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 lang) or (hieu qua)) - ((hanh doanh) or (doanh doanh)) cua khong song van han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (hieu qua)) - ((hanh doanh) OR (doanh doanh)) cua khong song van han tap.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (hieu qua)) - ((hanh doanh) or (doanh doanh)) cua khong song van han tap*.