Perhaps you should try some spelling variations:
sang minh » kang minah, anh minh, song min
minh tuan » dinh tuan, binh thuan, anh tuan
hua irene » hua ren
yang john » young john, king john, yang jin
john wong » john song, john bonn
hua chen » a chen, hua ren, qua chee
jui chen » yi chen
wong sam » wong sau, wong lai, kong sar
yu chen » yu cheng, yi chen, yulu chen

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: sang minh tuan ((hua irene) or (((((hua chen) OR (yu chen))) or (jui chen)))) yang john wong sam ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: sang minh tuan ((hua irene) OR (((((hua chen) OR (yu chen))) OR (jui chen)))) yang john wong sam ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "sang minh tuan ((hua irene) or (((((hua chen) OR (yu chen))) or (jui chen)))) yang john wong sam ;*".