Perhaps you should try some spelling variations:
yong yoon » wong yoon, yong khoon
dong yang » dong hoang, wang yang, yang yang
yuan gain » run gain, yuan kai, yuan lin
gain yang » dan yang, daun yang, tan yang
yang yi » yang di, yang xi, yang jui
yi dang » yi gang, yi yang, yi chang
hai » hadi, haji, hari

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