Perhaps you should try some spelling variations:
chang ch'un » chang chen, chang chuan, chang hsun
wan hyoung » wang hyoung, man houng, min hyoung
yan yuan » yan guan, fang yuan, yan clan
yang yue » wang yue, yang yun, yang jui
nan yan » nan ya, wang yan, qian yan
yang xi » yang di, yang jui
yang yi » 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: wan hyoung ((((yan yuan) OR (yang yue))) OR (nan yan)) tan ((yang xi) OR (yang yi)) chang ch'un ;~.
• Adding a wildcard symbol may retrieve word variants: wan hyoung ((((yan yuan) or (yang yue))) or (nan yan)) tan ((yang xi) or (yang yi)) chang ch'un ;*.