Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
canh doanh » chinh doanh, doanh doanh, kinh doanh
nhung cong » dung cong, thong cong, hang cong
hoc hieu » hoc thieu, doc hieu, hoc dieu
cong van » cong vang, cong san, song van
van phan » van phong, van thanh, luan phan
phan dau » phan tu, hang dau

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) OR (hoc hien)) manh - ((canh doanh) OR (hanh doanh)) va nhung cong van phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (hoc hien)) manh - ((canh doanh) or (hanh doanh)) va nhung cong van phan dau~".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (hoc hien)) manh - ((canh doanh) or (hanh doanh)) va nhung cong van phan dau*.