Perhaps you should try some spelling variations:
wang yuhan » wang luhang, wang yan, fang yuan
wang yidan » wang yan
did china » did china's
zhang tan » zhang tian, zhang fan, zhang yan
wong shiu » wong siu, cong shu, song shin
di china » ii china, d china, i china
tan wong » tan hong, tan kong, tan yong

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) OR (wang yidan)) fang ((di china) OR (did china)) zhang tan wong shiu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yuhan) OR (wang yidan)) fang ((di china) or (did china)) zhang tan wong shiu ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yuhan) OR (wang yidan)) fang ((di china) or (did china)) zhang tan wong shiu ;*.