Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
doc hieu » toc thieu, hoc thieu, hoc hien
cua nong » cua cong, cuu nong, cua dong
cong dao » cuong dao, cong dan, dong dao
ha dong » hoat dong, van dong
dao van » do van, dang van

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 - ((thanh trung) or (thanh tung)) ((cua nong) or (ha dong)) cong dao van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - ((thanh trung) OR (thanh tung)) ((cua nong) OR (ha dong)) cong dao van ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - ((thanh trung) or (thanh tung)) ((cua nong) or (ha dong)) cong dao van ban*.