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
doanh cua » doanh luan
cua nhung » va nhung
cong luan » tong luan, dong luan, cong luong
cong tuan » cong tan, cong thanh, cong quang

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