Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, yang yang
john song » john wong, john bonn, john ngosong
wing tan » wing ian, liang tan, hong tan
dong bin » dong sin, dong di, dann bin
guo john » seo john
wei guo » wei gu, wei tuo
et a » et al, et la, e a
y a » y la
shin » skin, sein, thin

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: ((wing tan) OR (((dong bin) OR (dong yang)))) ((et a) OR (y a)) wei guo john song shin ;~.
• Adding a wildcard symbol may retrieve word variants: ((wing tan) or (((dong bin) or (dong yang)))) ((et a) or (y a)) wei guo john song shin ;*.