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 jin » yang jie, yang jun, ying jin
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 jin) OR (yang jui)) wang wei ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yeung ((than change) OR (can change)) china who ((yang jin) or (yang jui)) wang wei ;~".
• Adding a wildcard symbol may retrieve word variants: yeung ((than change) OR (can change)) china who ((yang jin) or (yang jui)) wang wei ;*.