Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
chen zhang » zhen zhang, chen zheng, chen shuang
lang wang » lang lang, hong wang, ping wang
wang yuan » wang yuhan, wang yan, fang yuan
xin song » jin song, xin tong, kim song
yuan zi » yan zi, yuan li, yuan fei
shin » skin, sein, thin

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang wang yuan zi ((chen zhang) or (cheng zhang)) xin song shin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang wang yuan zi ((chen zhang) OR (cheng zhang)) xin song shin ;*.