Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
hieu manh » chieu xanh, dieu hanh, hien hanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
huong ben » cuong bien, huong dan, huong lan
huong den » huong dan, luong dien, huong doi
thanh cac » hanh cac, thanh bac, thanh ca

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 nhung ((huong ben) or (huong den)) thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (hieu nganh)) - canh tranh cua nhung ((huong ben) OR (huong den)) thanh cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (hieu nganh)) - canh tranh cua nhung ((huong ben) or (huong den)) thanh cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (hieu nganh)) - canh tranh cua nhung ((huong ben) or (huong den)) thanh cac*.