Perhaps you should try some spelling variations:
cheng yang » chen yang, cheng zhang, chen wang
yang john » young john, king john, yang jin
john wong » john song, john bonn
wong sau » wong sam, wong siu, wong shiu
yang yu » yang yue, yang yun, sang yu
yang yi » yang di, 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 ((yang yu) OR (yang yi)) cheng yang john wong sau ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ((yang yu) OR (yang yi)) cheng yang john wong sau ;".
• Adding a wildcard symbol may retrieve word variants: wang yan ((yang yu) OR (yang yi)) cheng yang john wong sau ;*.