Perhaps you should try some spelling variations:
cheng yang » chen yang, cheng zhang, chen wang
yang john » young john, king john, yang jin
john song » john wong, john bonn, john ngosong
yang yue » wang yue, yang yun, yang jui
song sau » wong sau, kong sar, song pae
yang yu » yang yun, yang yi, sang yu
wang » wing, wan

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 lang) yan ((yang yu) or (yang yue)) cheng yang john song sau ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR lang) yan ((yang yu) OR (yang yue)) cheng yang john song sau ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang OR lang) yan ((yang yu) or (yang yue)) cheng yang john song sau ;".
• Adding a wildcard symbol may retrieve word variants: (wang OR lang) yan ((yang yu) or (yang yue)) cheng yang john song sau ;*.