Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thanh toan » thanh hoa, thanh san, tinh toan
hanh doan » hanh doanh, thinh doan, nhanh hoan
doc hieu » toc thieu, hoc thieu, hoc hien
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo tieu)) xanh - ((hanh doan) OR (thanh toan)) va nhung cong san toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (theo tieu)) xanh - ((hanh doan) OR (thanh toan)) va nhung cong san toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo tieu)) xanh - ((hanh doan) OR (thanh toan)) va nhung cong san toan ban*.