Perhaps you should try some spelling variations:
tian john » brian john, ethan john, tuman john
ryan john » brian john
yan tuan » yan guan, yan yuan, anh tuan
tuan hua » tan hua, tuan vu, yuan hui
yan john » gain john, von john
wong sam » wong sau, wong lai, kong sar
hua ren » hua chen
wang » wing, wan, lang

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 yan tuan hua ren ((yan john) OR (((ryan john) OR (tian john)))) wong sam ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan tuan hua ren ((yan john) or (((ryan john) OR (tian john)))) wong sam ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan tuan hua ren ((yan john) or (((ryan john) OR (tian john)))) wong sam ;*.