Perhaps you should try some spelling variations:
china chang » china zhang, china changqi, china china
chin chang » chain change, china zhang, colin chang
wang yang » wang yan, wang liang, wang yanling
john wong » john song, john bonn
wing yan » wang yan, wing ian, wing tan
yang jui » yang judy, yang di, yang xi
wong shu » wong shiu, cong shu, wong sau

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: wing yan ((yang jui) OR (wang yang)) ((chin chang) OR (china chang)) john wong shu ;~.
• Adding a wildcard symbol may retrieve word variants: wing yan ((yang jui) or (wang yang)) ((chin chang) or (china chang)) john wong shu ;*.