Perhaps you should try some spelling variations:
during risk » during crises, during crisis, reducing risk
wang zhang » wang zheng, wang luhang, zhang zhang
zhang ying » zhang ming, zhang jing, zhang ping
using risk » using rs, funding risk, rising risks
coping shu » cong shu
der cost » oder cost, user cost, debt cost
eu cost » au costa, 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 ((eu cost) OR (der cost)) ((during risk) OR (using risk)) coping shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang zhang ying ((eu cost) or (der cost)) ((during risk) OR (using risk)) coping shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang zhang ying ((eu cost) or (der cost)) ((during risk) OR (using risk)) coping shu ;*.