Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
cua thuong » cua truong, cua phuong, ca thuong
hieu manh » chieu xanh, dieu hanh, hien hanh
tranh cua » doanh cua, manh cua
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
hanh tu » anh tu, danh tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) OR (hieu nganh)) - canh tranh cua thuong ((cong tan) or (cong san)) hanh tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (hieu nganh)) - canh tranh cua thuong ((cong tan) OR (cong san)) hanh tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (hieu nganh)) - canh tranh cua thuong ((cong tan) or (cong san)) hanh tu".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (hieu nganh)) - canh tranh cua thuong ((cong tan) or (cong san)) hanh tu*.