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 » jui chen, yu chen, a chen
wong sam » wong sau, wong lai, kong sar

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)) 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)) yang john wong sam ;*.