Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
canh doanh » hanh doanh, chinh doanh, kinh doanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong dang » cong dong, cong dan, cong dung
hoc hieu » hoc thieu, hoc hien, doc hieu
dang van » hoang van, hang va

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: hoc hieu manh - ((canh doanh) OR (doanh doanh)) ((va nhung) OR (cua cong)) cong dang van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((canh doanh) or (doanh doanh)) ((va nhung) or (cua cong)) cong dang van ban*.