Perhaps you should try some spelling variations:
doanh chua » doanh cua, doanh chu, doanh chung
hanh doanh » hang doanh, chinh doanh, doanh doanh
thieu qua » thieu cua, thieu quang, thien quan
chua bang » chu bang, chua nang, chua xang
bang song » nang song
song dan » song danh, song van, cong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu qua) or (thieu qua)) - hanh doanh chua bang song dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu qua) OR (thieu qua)) - hanh doanh chua bang song dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu qua) or (thieu qua)) - hanh doanh chua bang song dan toan ban*.