Perhaps you should try some spelling variations:
hua irene » hua ren
yang john » young john, king john, yang jin
john wong » john song, john bonn
wang anh » dang anh, wang yang, wang yan
anh tuan » anh tran, dinh tuan, oanh tran
hua chen » jui chen, yu chen, hua ren
wong sam » wong sau, wong lai, kong sar
a chen » ta chen, _ chen, n chen

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