Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh manh » hanh mang, lanh manh, hoang manh
doc hieu » toc thieu, hoc thieu, hoc hien
cua dong » chua dong, cua cong, cua dang
qua dung » quang dung, su dung, qua song
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than ban » thanh ban, toan ban, than man

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 - hanh manh ((cua dong) or (qua dung)) ((cong dan) OR (cong san)) than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - hanh manh ((cua dong) OR (qua dung)) ((cong dan) OR (cong san)) than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - hanh manh ((cua dong) or (qua dung)) ((cong dan) OR (cong san)) than ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - hanh manh ((cua dong) or (qua dung)) ((cong dan) OR (cong san)) than ban*.