Perhaps you should try some spelling variations:
yuan cheng » yuan chang, huang cheng, yu cheng
yang yang » wang yang, wang yan
yan wang » yuan wang, qian wang, yan liang
wang jun » pang jun, yang jun, wang jing
jun rene » juan rene, un reve
yang lin » yang jin, wang lin, yang li
jing ji » ying jin
hong yu » wong yue

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yuan cheng) or (((yan wang) OR (yang yang)))) wang jun rene ((jing ji) or (yang lin)) hong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yuan cheng) OR (((yan wang) OR (yang yang)))) wang jun rene ((jing ji) OR (yang lin)) hong yu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yuan cheng) or (((yan wang) OR (yang yang)))) wang jun rene ((jing ji) or (yang lin)) hong yu ;".
• Adding a wildcard symbol may retrieve word variants: ((yuan cheng) or (((yan wang) OR (yang yang)))) wang jun rene ((jing ji) or (yang lin)) hong yu ;*.