Perhaps you should try some spelling variations:
wang yidan » wang yan
yidan kang » yuan kang
ahsan syed » khan syed
tung chung » fung chung, kung chung, tang chun
khan sher » han shen, khan syed, than she
chan tung » chan eng, chan fong, chan kang
chung zhi » chung chi, chen zhi, chung h

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 ((khan sher) or (ahsan syed)) chan tung chung zhi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yidan kang ((khan sher) OR (ahsan syed)) chan tung chung zhi ;.
• Adding a wildcard symbol may retrieve word variants: wang yidan kang ((khan sher) or (ahsan syed)) chan tung chung zhi ;*.