Perhaps you should try some spelling variations:
chen yulan » chen yugang, chen yulu, chen yun
yang yang » wang yang, wang yan
yulan kai » yuan kai
hong paul » ron paul
yang yun » yang jun, tang yun, yang yue
kai hong » bai chong, hai phong, wai hoong
nan yan » nan ya, wang yan, qian yan

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: nan yan ((((yang yun) OR (yang yang))) OR (yang di)) chen yulan kai hong paul ;~.
• Adding a wildcard symbol may retrieve word variants: nan yan ((((yang yun) or (yang yang))) or (yang di)) chen yulan kai hong paul ;*.