Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
toc hieu » toc thieu, doc hieu, hoc thieu
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu manh - canh tranh ((cua dung) OR (cua dong)) ((cong dan) or (cong tan)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu manh - canh tranh ((cua dung) OR (cua dong)) ((cong dan) OR (cong tan)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc hieu manh - canh tranh ((cua dung) OR (cua dong)) ((cong dan) or (cong tan)) toan ban".
• Adding a wildcard symbol may retrieve word variants: toc hieu manh - canh tranh ((cua dung) OR (cua dong)) ((cong dan) or (cong tan)) toan ban*.