Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh luan » doanh nhan
luan thong » luan phong, luan tuong, luat thong
hieu quan » lieu quan, thien quan, lien quan
thong van » trong van, thong va, thong quan
thanh tai » thanh hai, thanh toan, doanh tai
hanh tai » hang tai, han tai, hinh tai

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

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