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