Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
khien bang » phien ban, khien dong
hoc khien » hoc hien, hoc nghien, hoc thieu
doanh cam » doanh cao, doanh chau, doanh tai
nang cong » nang song, dang cong, bang cong
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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

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