Perhaps you should try some spelling variations:
chen ping » chen rong, chen yang, chen wang
dong sein » dong sin, dong bin, dong wei
ping liu » ping lin, dong liu, ping jia
yang yue » yang yun, yang jui, yang yi
wang yue » wong yue, wang hua, wang yan
dong di » dong sin
dann yu » wann yu
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 sein) OR (dong di)) dann yu chen ping liu ((yang yue) OR (wang yue)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong sein) or (dong di)) dann yu chen ping liu ((yang yue) OR (wang yue)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong sein) or (dong di)) dann yu chen ping liu ((yang yue) OR (wang yue)) ;*.