Perhaps you should try some spelling variations:
nhan nhung » nhien nhung, tham nhung, nhan nhanh
hanh doanh » hang doanh, chinh doanh, doanh doanh
gian nhung » gian vung, gioi nhung
hieu manh » chieu xanh, hieu nganh, hien hanh
cong dan » cong san, cong tan, huong dan
gian cau » gian chau, gian cac, gian cam

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 (dieu hanh)) - hanh doanh ((nhan nhung) OR (gian nhung)) cong dan gian cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (dieu hanh)) - hanh doanh ((nhan nhung) OR (gian nhung)) cong dan gian cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (dieu hanh)) - hanh doanh ((nhan nhung) OR (gian nhung)) cong dan gian cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (dieu hanh)) - hanh doanh ((nhan nhung) OR (gian nhung)) cong dan gian cau*.