Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trung » thanh trung, hanh trang, danh trung
manh trung » manh tung, thanh trung, manh hung
dung doanh » dung dan, dung dong
doanh van » doan van, doanh va, doanh ban
kha dung » khoa dung, khao dung, nha dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu nganh) or (chieu xanh)) - ((hanh trung) OR (manh trung)) kha dung doanh doanh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (chieu xanh)) - ((hanh trung) OR (manh trung)) kha dung doanh doanh van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) or (chieu xanh)) - ((hanh trung) OR (manh trung)) kha dung doanh doanh van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (chieu xanh)) - ((hanh trung) OR (manh trung)) kha dung doanh doanh van ban*.