Perhaps you should try some spelling variations:
zhang ming » zhang xin
hyoung gun » young eun
chan ming » kian ming, chan eng, chan fong
wang anh » dang anh, wang yang, wang yan
anh tran » oanh tran, anh tuan, binh tran
tran van » trang van, trang vang, frans van
van gain » run gain, n gain, van geen
yang jin » yang jie, yang jun, ying jin

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 tran van gain ((yang jin) OR (((chan ming) OR (zhang ming)))) hyoung gun ;~.
• Adding a wildcard symbol may retrieve word variants: wang anh tran van gain ((yang jin) or (((chan ming) or (zhang ming)))) hyoung gun ;*.