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, than she
khan syed » ahsan syed, shah syed
chan kung » chan kang, chan eng, chan fong
chung zhi » chen zhi, chung h, zhang zhi
chung chi » chung h

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

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