Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
manh tung » manh hung, thanh tung
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
cong san » cong tac
hanh cat » hanh cac, hanh luat, nhanh cay
khan cap » khan ap, than cap, khoan cam

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 - manh tung ((cua dung) or (cua dong)) cong san ((hanh cat) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - manh tung ((cua dung) OR (cua dong)) cong san ((hanh cat) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - manh tung ((cua dung) or (cua dong)) cong san ((hanh cat) or (khan cap))*.