Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh cua » doanh luan
dung cong » dung trong
hieu cac » hieu luc, hieu va, hieu van
van toan » van tuan, van tan, van thanh
toan tap » toan 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 cac) or (hieu qua)) - hanh doanh cua ((nhung cong) or (dung cong)) van toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cac) OR (hieu qua)) - hanh doanh cua ((nhung cong) OR (dung cong)) van toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cac) or (hieu qua)) - hanh doanh cua ((nhung cong) or (dung cong)) van toan tap*.