Perhaps you should try some spelling variations:
than change » chain change, mean change, when change
can change » urban change
china who » china why, china what, china won
yang jie » yang jin, yang di, yang xi
yang jui » yang judy, yang di, yang xi
wang wei » zhang wei, wang zhi
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 ((than change) OR (can change)) china who ((yang jie) OR (yang jui)) wang wei ;~.
• Adding a wildcard symbol may retrieve word variants: yeung ((than change) or (can change)) china who ((yang jie) or (yang jui)) wang wei ;*.