Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
zhang hui » zhang yuhui, zhang shuo, chuang hui
zhong shu » zhang shuo, cong shu
zhong zhi » zhang zhi, hong ghi, zhong tai
yang yun » yang jun, tang yun, yang yue
wan yan » wang yan, nan yan, wai yan
yang yi » yang di, yang xi, yang jui

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan ((yang yun) OR (yang yi)) cheng zhang hui ((zhong shu) OR (zhong zhi)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yan ((yang yun) or (yang yi)) cheng zhang hui ((zhong shu) OR (zhong zhi)) ;~".
• Adding a wildcard symbol may retrieve word variants: wan yan ((yang yun) or (yang yi)) cheng zhang hui ((zhong shu) OR (zhong zhi)) ;*.