Perhaps you should try some spelling variations:
doanh thanh » danh thanh, doanh nhan, dinh thanh
thanh toan » thanh hoa, thanh san, tinh toan
hiem ngan » kim ngan, viem gan
toan mang » toan tang, toan thang, tran manh
mang cong » dang cong, bang cong, hang cong
cong san » cong tac
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 ((dieu hanh) or (hiem ngan)) - doanh thanh toan mang cong san ((toan ban) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (hiem ngan)) - doanh thanh toan mang cong san ((toan ban) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (hiem ngan)) - doanh thanh toan mang cong san ((toan ban) or (toan tap))*.