Perhaps you should try some spelling variations:
zhang yifan » zhang fan, zhang jian, zhang yan
yang tian » yang liang, zhang tian, yang dean
chen zhen » chen zhe
zhen yong » chen yong, zheng rong, zheng cong
yong pong » yong phang, ping pong, dong ping
pong zhi » zhong zhi, wang zhi
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: wang ((yang tian) OR (zhang yifan)) yu chen zhen yong pong zhi ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((yang tian) or (zhang yifan)) yu chen zhen yong pong zhi ;*.