Perhaps you should try some spelling variations:
dong nguon » dung nguon, cong nguon, luong nguon
hieu nganh » vien nganh, hiem ngan, nghiep nganh
hieu manh » chieu xanh, dieu hanh, hien hanh
nguon van » nguon von, nguoi van, nguyen van
van manh » van minh, van anh, van hanh
cua dong » chua dong, cua cong, cua dang
ban can » ban dan, ban hang, ban hanh

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)) - ((van manh) or (canh tranh)) cua dong nguon van ban can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (hieu nganh)) - ((van manh) OR (canh tranh)) cua dong nguon van ban can.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (hieu nganh)) - ((van manh) or (canh tranh)) cua dong nguon van ban can*.