Perhaps you should try some spelling variations:
yong yoon » wong yoon, yong khoon
yang yang » wang yang, wang yan
vii chang » viii chang, ii chang, vii anhang
chang hai » chang ha, shang hai, change has
tan yang » dan yang, tan ying, tan yong
yuan kai » yuan kang, yuan fei, tan kai
kai yang » kai fang, yao yang, dan yang
yang vii » yang zili, yang di, yang jui

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 (((tan yang) OR (yang yang)))) yuan kai yang vii chang hai ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((yong yoon) or (((tan yang) or (yang yang)))) yuan kai yang vii chang hai ;*.