Perhaps you should try some spelling variations:
earning among » learning among, eating among, meaning among
chen earning » when learning, open learning
yang yang » wang yang, wang yan
zhong tai » hong tan, hong hai, zhong zhi
zhang zhi » zhong zhi, wang zhi, zhang wei
yana yu » yang yue, yang yun
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: ((yang yang) OR (dong sin)) yana yu chen earning among ((zhong tai) OR (zhang zhi)) ;~.
• Adding a wildcard symbol may retrieve word variants: ((yang yang) or (dong sin)) yana yu chen earning among ((zhong tai) or (zhang zhi)) ;*.