Perhaps you should try some spelling variations:
juan peng » juan meng, juan rene
chen john » chown john, chen jian, chen jean
yan juan » san juan, yan guan, yan yuan
sen john » stein john, stern john, von john
wong sau » wong sam, wong siu, wong shiu
nan yan » nan ya, wang yan, qian yan
wang » wing

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: ((wang OR wan) OR lang) nan yan juan peng ((sen john) OR (chen john)) wong sau ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang or wan) or lang) nan yan juan peng ((sen john) OR (chen john)) wong sau ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang or wan) or lang) nan yan juan peng ((sen john) OR (chen john)) wong sau ;*.