Perhaps you should try some spelling variations:
china chang » chin chang, china zhang, china changqi
chang hong » change hong, zhang hong, change long
yang yang » wang yang
wong sam » wong sau, wong lai, kong sar
wong siu » wong shiu, kong siu, wong sau
yang yi » yang xi, yang jui
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yan) OR (yang yang)) ((yang yi) OR (yang di)) china chang hong ((wong sam) OR (wong siu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yan) OR (yang yang)) ((yang yi) OR (yang di)) china chang hong ((wong sam) OR (wong siu)) ;".
• Adding a wildcard symbol may retrieve word variants: ((wang yan) OR (yang yang)) ((yang yi) OR (yang di)) china chang hong ((wong sam) OR (wong siu)) ;*.