Perhaps you should try some spelling variations:
yong yoon » wong yoon, yong khoon
dong yang » dong hoang, wang yang, yang yang
yuan kang » yuan wang, yuan chang, chan kang
kang yang » wang yang, yang yang, kang young
yong yan » yang yang, ying yang, wang yan
yang jin » yang jie, yang jun, ying jin
jin kang » jin chang, jin kyung, jing fang
kang hai » dang hai, kang han, shang hai

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 ((((yong yan) OR (yong yoon))) OR (dong yang)) yuan kang yang jin kang hai ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((((yong yan) or (yong yoon))) or (dong yang)) yuan kang yang jin kang hai ;*.