Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trung » thanh trung, hanh trang, manh trung
trung cua » truong cua, trung tuan, trung cap
hanh luat » nganh luat, hang luan, hanh lam
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
khan cap » khan ap, than cap, khoan cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - hanh trung cua dung ((cong san) OR (cong tac)) ((hanh luat) OR (khan cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - hanh trung cua dung ((cong san) OR (cong tac)) ((hanh luat) or (khan cap))~".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - hanh trung cua dung ((cong san) OR (cong tac)) ((hanh luat) or (khan cap))*.