Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
nhung cong » dung cong, thong cong, hang cong
doanh cua » doanh luan
cua nhung » va nhung
doc hieu » toc thieu, hoc thieu
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc hien)) xanh - doanh doanh cua nhung cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) xanh - doanh doanh cua nhung cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) xanh - doanh doanh cua nhung cong tan van ban*.