Perhaps you should try some spelling variations:
chinh doanh » kinh doanh
hieu quan » lieu quan, thien quan, lien quan
doanh cua » doanh luan
cua thong » cua thuong, cua khong, cua tong
thong qua » thong quan, thong cua, thong tu
qua than » qua thanh, qua phan, qua tan
than tai » thanh tai, toan tai, 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 qua) or (hieu quan)) - chinh doanh cua thong thong qua than tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu qua) OR (hieu quan)) - chinh doanh cua thong thong qua than tai.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu qua) or (hieu quan)) - chinh doanh cua thong thong qua than tai*.