Perhaps you should try some spelling variations:
ratings risk » patients risk
savings risk » savings cross, savings rate, savings bank
zhang ying » zhang ming, zhang jing, zhang ping
der cost » oder cost, user cost, debt cost
eu cost » au costa, end cost, eu court
how she » how some, how safe, how shih
zhen » zheng, when, 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: zhen zhang ying ((eu cost) OR (der cost)) ((savings risk) OR (ratings risk)) how she ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "zhen zhang ying ((eu cost) or (der cost)) ((savings risk) OR (ratings risk)) how she ;~".
• Adding a wildcard symbol may retrieve word variants: zhen zhang ying ((eu cost) or (der cost)) ((savings risk) OR (ratings risk)) how she ;*.