Perhaps you should try some spelling variations:
doanh thanh » danh thanh, doanh nhan, dinh thanh
doanh doanh » toan doanh, doanh hoan, dong doanh
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
doc hieu » toc thieu, hoc thieu
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao 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) OR (doanh thanh)) cua nhung cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) xanh - ((doanh doanh) OR (doanh thanh)) cua nhung cong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (hoc hien)) xanh - ((doanh doanh) OR (doanh thanh)) cua nhung cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) xanh - ((doanh doanh) OR (doanh thanh)) cua nhung cong dan van ban*.