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

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 manh) OR (hieu nganh)) - anh dang luan hung cong san ((than cau) OR (phan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu manh) or (hieu nganh)) - anh dang luan hung cong san ((than cau) OR (phan cau))~".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) or (hieu nganh)) - anh dang luan hung cong san ((than cau) OR (phan cau))*.