Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
hieu manh » chieu xanh, dieu hanh, hien hanh
quan dung » quang dung, quan duong, qua dung
bai quan » hai quan, ban quan, mai quan
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan tap » phan lap, han tap, pha tap
anh bai » sach bai, danh bat, hinh bai

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 nganh) OR (hieu manh)) - anh bai quan dung ((cong dan) or (cong san)) phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu nganh) OR (hieu manh)) - anh bai quan dung ((cong dan) OR (cong san)) phan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu nganh) OR (hieu manh)) - anh bai quan dung ((cong dan) or (cong san)) phan tap".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu nganh) OR (hieu manh)) - anh bai quan dung ((cong dan) or (cong san)) phan tap*.