Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trung » thanh trung, hanh trang, manh trung
trung kha » trung khoa, trung ha, truong khoa
cong doan » cong dan, dong doanh, cong san
cong hoan » cong hoa, dong hoa, cong san
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 kha dung ((cong doan) OR (cong hoan)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (chieu xanh)) - hanh trung kha dung ((cong doan) OR (cong hoan)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) or (chieu xanh)) - hanh trung kha dung ((cong doan) OR (cong hoan)) van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (chieu xanh)) - hanh trung kha dung ((cong doan) OR (cong hoan)) van ban*.