Perhaps you should try some spelling variations:
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
chan ming » kian ming, chan eng, chan fong
yu cheng » yu chen, _ cheng
wong siu » wong shiu, kong siu, wong sau
wong sam » wong sau, wong lai, kong sar
a chen » ta chen, _ chen, n chen

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang yang) OR (wang yang)) fan ((a chen) or (yu cheng)) chan ming ((wong siu) or (wong sam)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (wang yang)) fan ((a chen) OR (yu cheng)) chan ming ((wong siu) OR (wong sam)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) OR (wang yang)) fan ((a chen) or (yu cheng)) chan ming ((wong siu) or (wong sam)) ;".
• Adding a wildcard symbol may retrieve word variants: ((yang yang) OR (wang yang)) fan ((a chen) or (yu cheng)) chan ming ((wong siu) or (wong sam)) ;*.