Perhaps you should try some spelling variations:
sharing risk » sharing best, during risk
cost sharing » risk sharing, cost savings
zhang zhang » zhen zhang, cheng zhang, zhang fang
risk coping » risk pooling
wang zhang » wang zheng, wang luhang, wang liang
coping shu » cong shu
zhu cost » eu cost

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 zhang) OR (zhang zhang)) ying zhu cost sharing risk coping shu ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang zhang) or (zhang zhang)) ying zhu cost sharing risk coping shu ;*.