Perhaps you should try some spelling variations:
dung doanh » dung dan, dung dong
hanh doanh » hang doanh, chinh doanh, doanh doanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
nhan hung » nhanh hung, phan hung, nhan ung
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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 - ((hanh doanh) or (dung doanh)) nhan hung ((cong dan) OR (cong tan)) gian cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((hanh doanh) OR (dung doanh)) nhan hung ((cong dan) OR (cong tan)) gian cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - ((hanh doanh) or (dung doanh)) nhan hung ((cong dan) OR (cong tan)) gian cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((hanh doanh) or (dung doanh)) nhan hung ((cong dan) OR (cong tan)) gian cau*.