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

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