Perhaps you should try some spelling variations:
zhang tian » zhang jian, zhang silan, zhang yifan
yang tian » yang liang, yang dean, yang fan
chen zhen » chen zhe
zhen yong » chen yong, zheng rong, zheng cong
zhong zhi » zhang zhi, hong ghi, zhong tai
pong 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 tian)) yu chen zhen yong ((pong zhi) OR (zhong zhi)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yang tian) or (zhang tian)) yu chen zhen yong ((pong zhi) OR (zhong zhi)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yang tian) or (zhang tian)) yu chen zhen yong ((pong zhi) OR (zhong zhi)) ;*.