Perhaps you should try some spelling variations:
wang yidan » wang yan
chen yang » chen rong
yang john » young john, king john, yang jin
john kong » john king, john song, john wong
wang dan » wang yan, wang ban, wang yang
yang yu » yang yue, yang yun, yang yi
yu chen » yu cheng, yi chen, yulu chen

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang dan) OR (wang yidan)) yang yu chen yang john kong (sar or star) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang dan) OR (wang yidan)) yang yu chen yang john kong (sar OR star) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang dan) OR (wang yidan)) yang yu chen yang john kong (sar or star) ;".
• Adding a wildcard symbol may retrieve word variants: ((wang dan) OR (wang yidan)) yang yu chen yang john kong (sar or star) ;*.