Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
wang ping » wang jing, wang ning, wang peng
ping wang » ping pong, hong wang
zhang hay » zhang han, zhang fan, zhang yan
yang bin » yang lin, huang bin, yang jing
yang jin » yang jie, yang jun, ying jin
yan fan » yang fan, yan clan, yan guan

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 ping wang ((yan fan) OR (yang guang)) ((yang bin) OR (yang jin)) zhang hay ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ping wang ((yan fan) or (yang guang)) ((yang bin) OR (yang jin)) zhang hay ;~".
• Adding a wildcard symbol may retrieve word variants: wang ping wang ((yan fan) or (yang guang)) ((yang bin) OR (yang jin)) zhang hay ;*.