Perhaps you should try some spelling variations:
yuan cheng » yuan chang, huang cheng, yu cheng
wang yuan » wang yuhan, wang yan, fang yuan
cheng run » cheng guan, cheng han, cheng lu
yang yang » wang yang, wang yan
tan yang » dan yang, tan ying, tan yong
jin song » jie song, john song, kim song
song sar » kong sar, using sar, song pae

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yuan cheng run ((yang yang) or (tan yang)) jin song sar ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yuan cheng run ((yang yang) OR (tan yang)) jin song sar ;*.