Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
hieu nganh » vien nganh, hiem ngan, hieu manh
hieu xanh » chieu xanh, hieu manh, dieu hanh
cong dang » cong dong, cong dan, cong dung
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
dang van » hoang van, hang va

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 xanh) or (hieu nganh)) - doanh doanh ((cua dung) OR (qua dung)) cong dang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu nganh)) - doanh doanh ((cua dung) OR (qua dung)) cong dang van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (hieu nganh)) - doanh doanh ((cua dung) OR (qua dung)) cong dang van ban".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu nganh)) - doanh doanh ((cua dung) OR (qua dung)) cong dang van ban*.