Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
zhi cheng » zhi chen, fuzhi cheng, xi cheng
zhang kim » zhang xin, kang kim, zhang i
song thin » song shin, song jin, song min
qian yan » qian jun, qian yi
kim song » kim young, kim eung
yan zhi » yan zi, wang zhi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wan or lang) or wing) qian yan zhi cheng zhang kim song thin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wan OR lang) OR wing) qian yan zhi cheng zhang kim song thin ;*.