Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
van nhung » van nhuong, va nhung, van phung
manh hung » anh huong
doc hieu » toc thieu, hoc thieu, hoc hien
van hung » van dung, van duong, van dong
cong dan » cong san, cong tan, huong dan
dan can » dan chan, dan canh, dan ca
can cau » van cau, ban cau, ca cau

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 xanh - canh tranh ((van nhung) or (((van hung) or (manh hung)))) cong dan can cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh tranh ((van nhung) OR (((van hung) OR (manh hung)))) cong dan can cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh tranh ((van nhung) or (((van hung) or (manh hung)))) cong dan can cau*.