Perhaps you should try some spelling variations:
wang yidan » wang yan
yidan kang » yuan kang
zhang ming » zhang xin
han cheng » han chang, huang cheng, hong cheng
tan cheng » tang zheng, yuan cheng, tan hong
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 kang ((han cheng) OR (tan cheng)) zhang ming ((zhong zhi) or (zhang zhi)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yidan kang ((han cheng) OR (tan cheng)) zhang ming ((zhong zhi) OR (zhang zhi)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yidan kang ((han cheng) OR (tan cheng)) zhang ming ((zhong zhi) or (zhang zhi)) ;".
• Adding a wildcard symbol may retrieve word variants: wang yidan kang ((han cheng) OR (tan cheng)) zhang ming ((zhong zhi) or (zhang zhi)) ;*.