Perhaps you should try some spelling variations:
sharing risk » sharing best, during risk
risk coping » risk pooling
zhang ying » zhang jing, zhang ping, zhang ting
zhang ming » zhang xin
coping shu » cong shu
au costa » can costa, _ costa, da costa
eu cost » der cost, end cost, eu court

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 ying) OR (zhang ming)) ((eu cost) OR (au costa)) sharing risk coping shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((zhang ying) or (zhang ming)) ((eu cost) OR (au costa)) sharing risk coping shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((zhang ying) or (zhang ming)) ((eu cost) OR (au costa)) sharing risk coping shu ;*.