Perhaps you should try some spelling variations:
wang yidan » wang yan
yidan wang » yiqian wang, qian wang, yan wang
khan sher » han shen, than she
khan syed » ahsan syed, shah syed
zhang xin » zhang jian, zhang ming, zhang fan
zhang zhi » zhong zhi, wang zhi, zhang dai
zhang wei » zhen wei

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 ((khan sher) OR (khan syed)) zhang xin ((zhang zhi) or (zhang wei)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yidan wang ((khan sher) OR (khan syed)) zhang xin ((zhang zhi) OR (zhang wei)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yidan wang ((khan sher) OR (khan syed)) zhang xin ((zhang zhi) or (zhang wei)) ;".
• Adding a wildcard symbol may retrieve word variants: wang yidan wang ((khan sher) OR (khan syed)) zhang xin ((zhang zhi) or (zhang wei)) ;*.