Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
yihan guan » yan guan
zhang xin » zhang jian, zhang ming, zhang fan
qing shih » ming shih
yan yuan » yan guan, fang yuan, nan yan
yu cheng » yu chen, _ cheng
xin qing » ming qing, dan qing, liu qing

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((wang OR lang) or wan) or wing) ((yan yuan) or (yihan guan)) yu cheng zhang xin qing shih ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((wang OR lang) OR wan) OR wing) ((yan yuan) OR (yihan guan)) yu cheng zhang xin qing shih ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((wang OR lang) or wan) or wing) ((yan yuan) or (yihan guan)) yu cheng zhang xin qing shih ;*".