Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yan, wang yidan
ahsan syed » khan syed
yuhan kai » yuan kai
chan fong » chew fong, chan eng, chan kang
chung zhi » chung chi, chung h, zhang zhi
than she » khan sher, than one, than we
chen zhi » chen zhe, chen zhen, chen chih

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 yuhan kai ((than she) OR (ahsan syed)) chan fong ((chung zhi) OR (chen zhi)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yuhan kai ((than she) or (ahsan syed)) chan fong ((chung zhi) OR (chen zhi)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yuhan kai ((than she) or (ahsan syed)) chan fong ((chung zhi) OR (chen zhi)) ;*.