Perhaps you should try some spelling variations:
wang yuan » wang yuhan, wang yan, fang yuan
yuan kang » yuan wang, yuan chang, chan kang
khan sher » han shen, khan syed, than she
chan tang » chan kang, chan eng, chan fong
tang chun » wang chun, tung chung, kang chen
chun zhi » chen zhi, chung chi, chen zhe

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yuan kang ((khan sher) or (shah syed)) chan tang chun zhi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yuan kang ((khan sher) OR (shah syed)) chan tang chun zhi ;.
• Adding a wildcard symbol may retrieve word variants: wang yuan kang ((khan sher) or (shah syed)) chan tang chun zhi ;*.