Perhaps you should try some spelling variations:
yuan cheng » yuan chang, huang cheng, yu cheng
yang yong » wang yong, kang young, wang yang
yang yang » wang yang, wang yan
cong sun » cong shu, cong van, wing sun
sun clan » sun yan, sun jian, und clan
clan yan » qian yan, nan yan
yan yuan » yan guan, fang yuan, nan yan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: cong sun clan yan yuan cheng ((((yang yong) or (wang hyoung))) or (yang yang)) mi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cong sun clan yan yuan cheng ((((yang yong) OR (wang hyoung))) OR (yang yang)) mi ;.
• Adding a wildcard symbol may retrieve word variants: cong sun clan yan yuan cheng ((((yang yong) or (wang hyoung))) or (yang yang)) mi ;*.