Perhaps you should try some spelling variations:
wang yidan » wang yan
yidan wang » yiqian wang, qian wang, yan wang
yuan cheng » yuan chang, huang cheng, yu cheng
zhang ming » zhang xin
han cheng » han chang, tan cheng, huang cheng
zhong zhi » hong ghi, zhong tai
zhang zhi » wang zhi, zhang wei, zhang dai

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yidan wang ((han cheng) or (yuan cheng)) zhang ming ((zhong zhi) or (zhang zhi)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yidan wang ((han cheng) OR (yuan cheng)) zhang ming ((zhong zhi) OR (zhang zhi)) ;.
• Adding a wildcard symbol may retrieve word variants: wang yidan wang ((han cheng) or (yuan cheng)) zhang ming ((zhong zhi) or (zhang zhi)) ;*.