Perhaps you should try some spelling variations:
hieu nganh » hiem ngan, hieu manh, nghiep nganh
vien nganh » vien thanh
hanh tran » hanh trang, thanh tran, hanh tram
hung cong » nhung cong, hung cuong, phung cong
tran van » luan van
van hung » van dung, manh hung, van duong
ban hang » ngan hang

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: hoc ((hieu nganh) OR (vien nganh)) - hanh tran van hung cong ((ban hanh) OR (ban hang)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) OR (vien nganh)) - hanh tran van hung cong ((ban hanh) or (ban hang)) cao~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) OR (vien nganh)) - hanh tran van hung cong ((ban hanh) or (ban hang)) cao*.