Perhaps you should try some spelling variations:
mean change » urban change
can change » urban change
china who » china why, china what, china won
yang jun » pang jun, yang jin, yang judy
yang jui » yang judy, yang di, yang xi
wang hui » wang hua, wang zhi, wang wei
yeung » young

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

• If you are trying to use Boolean operators, they must be ALL CAPS: yeung ((mean change) OR (can change)) china who ((yang jun) OR (yang jui)) wang hui ;~.
• Adding a wildcard symbol may retrieve word variants: yeung ((mean change) or (can change)) china who ((yang jun) or (yang jui)) wang hui ;*.