Perhaps you should try some spelling variations:
guan rene » juan rene, glas rene
wong shiu » wong siu, cong shu, song shin
lang yan » wang yan, wang yang, zhang yan
gan guan » yan guan, quan guan, fan guon
yang jun » yang jui, pang jun, yang jin
yan gan » yan guan, yan clan, yan wang
yang yi » yang xi, yang jui
sin » sign, sind, skin

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: lang yan gan guan rene ((((yang jun) OR (yang yi))) OR (yang di)) ((wong shiu) OR (dong sin)) ;~.
• Adding a wildcard symbol may retrieve word variants: lang yan gan guan rene ((((yang jun) or (yang yi))) or (yang di)) ((wong shiu) or (dong sin)) ;*.