Perhaps you should try some spelling variations:
yuan cheng » yuan chang, huang cheng, yu cheng
zhang jing » zhang ming, zhang jin, zhang ping
chang deok » chan seok
yuan wang » yan wang, yuan kang, yuan chang
she zhang » zhen zhang, shen chang, jie zhang
chang seo » chang soon, change sea, hong seo
yang jun » yang jui, pang jun, yang jin
jun she » jian she

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: ((yuan wang) OR (yuan cheng)) yang jun she zhang jing ((chang seo) OR (chang deok)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yuan wang) or (yuan cheng)) yang jun she zhang jing ((chang seo) OR (chang deok)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((yuan wang) or (yuan cheng)) yang jun she zhang jing ((chang seo) OR (chang deok)) ;*.