Perhaps you should try some spelling variations:
sharing risk » sharing best
during risk » using risk, during crises, during crisis
chen zhang » cheng zhang, zhen zhang, chen zheng
zhang ying » zhang ming, zhang jing, zhang ping
how some » how women
ying eu » ying zhu, using eu, ying hua
eu cost » au costa, der cost, end cost
how she » how safe, how shih

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: chen zhang ying eu cost ((sharing risk) OR (during risk)) ((how she) or (how some)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chen zhang ying eu cost ((sharing risk) OR (during risk)) ((how she) OR (how some)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chen zhang ying eu cost ((sharing risk) OR (during risk)) ((how she) or (how some)) ;*".