Perhaps you should try some spelling variations:
yang jean » yang dean, young jean, yang fan
john wong » john song, john bonn
wong minh » gong min, jong min, sang minh
tong shui » cong shu
yang pan » yang fan, yang dean, yang yang
tong hui » wang hui
gong hui » wang hui, gong si, dong hua
di john » dr john, de john, bei john

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 ((yang pan) OR (yang jean)) di john wong minh ((((tong shui) OR (tong hui))) OR (gong hui)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((yang pan) or (yang jean)) di john wong minh ((((tong shui) or (tong hui))) or (gong hui)) ;*.