Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
hieu xanh » chieu xanh, dieu hanh, hien hanh
hieu manh » chieu xanh, dieu hanh, hien hanh
tang luan » dung luan
luan hung » luan chung, lan hung, luan ung
hung cong » nhung cong, hung cuong, phung cong
anh tang » anh bang, anh dang, anh nang
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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