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 yan » zhang fan, zhang jian, wang yan
wong shiu » wong siu, cong shu, song shin
di china » ii china, d china, i china
yan wong » yan cong, yan wang, y wong

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 yan wong shiu ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang yuhan) or (wang yidan)) fang ((di china) or (did china)) zhang yan wong shiu ;*.