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
song thin » song shin, song jin, song min
xin song » jin song, xin tong, kim song
yan zi » yan zhi, yuan zi, ban zi

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 yan zi ((chen zhang) or (cheng zhang)) xin song thin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang wang yan zi ((chen zhang) OR (cheng zhang)) xin song thin ;*.