Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
yang john » young john, king john, yang jin
john wong » john song, john bonn
hua rene » hua ren, juan rene
wong sau » wong sam, wong siu, wong shiu
yan yan » yan yuan, nan yan, wang yan
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 yan) OR (yang yang)) hua rene yang john wong sau ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR wing) ((yan yan) OR (yang yang)) hua rene yang john wong sau ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang or wing) ((yan yan) OR (yang yang)) hua rene yang john wong sau ;".
• Adding a wildcard symbol may retrieve word variants: (wang or wing) ((yan yan) OR (yang yang)) hua rene yang john wong sau ;*.