Perhaps you should try some spelling variations:
cheng yang » chen yang, cheng zhang, chen wang
yang john » young john, king john, yang jin
wong shiu » wong siu, cong shu, song shin
yang yue » wang yue, yang yun, yang jui
wong sau » wong sam, wong siu, wong lai
yang yu » yang yun, yang yi, sang yu
wang » wing, wan, lang

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: wang yan ((yang yu) OR (yang yue)) cheng yang john ((wong sau) OR (wong shiu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan ((yang yu) or (yang yue)) cheng yang john ((wong sau) OR (wong shiu)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan ((yang yu) or (yang yue)) cheng yang john ((wong sau) OR (wong shiu)) ;*.