Perhaps you should try some spelling variations:
ping john » king john, kong john, wong john
dong bin » dong sin, dann bin
hua chen » jui chen, a chen, hua ren
song yue » song yun, hong yu, wang yue
wong yue » wang yue, hong yu
dong di » dong sin
yu chen » yu cheng, yi chen, yulu chen

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: ((dong bin) OR (dong di)) ya ((hua chen) OR (yu chen)) ping john ((song yue) OR (wong yue)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong bin) or (dong di)) ya ((hua chen) or (yu chen)) ping john ((song yue) OR (wong yue)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong bin) or (dong di)) ya ((hua chen) or (yu chen)) ping john ((song yue) OR (wong yue)) ;*.