Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » manh cua
doanh cua » doanh luan
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu manh - canh ((tranh cua) or (doanh cua)) dung ((cong dan) or (cong tan)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - canh ((tranh cua) OR (doanh cua)) dung ((cong dan) OR (cong tan)) phan cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - canh ((tranh cua) or (doanh cua)) dung ((cong dan) or (cong tan)) phan cau*.