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
yang jui » yang judy, yang di, yang xi
wong sau » wong sam, wong siu, wong shiu
yang yu » yang yue, yang yun, yang yi
wang » 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 or wing) yan ((yang yu) or (yang jui)) cheng yang john wong sau ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR wing) yan ((yang yu) OR (yang jui)) cheng yang john wong sau ;.
• Adding a wildcard symbol may retrieve word variants: (wang or wing) yan ((yang yu) or (yang jui)) cheng yang john wong sau ;*.