Perhaps you should try some spelling variations:
sharing risk » sharing best, during risk
cost sharing » risk sharing, cost savings
zhang ying » zhang ming, zhang jing, zhang ting
zhang ping » zhang ming, zhang jing, zhang ting
how some » how women
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) OR (zhang ping)) eu cost sharing risk ((how she) or (how some)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chen ((zhang ying) OR (zhang ping)) eu cost sharing risk ((how she) OR (how some)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chen ((zhang ying) OR (zhang ping)) eu cost sharing risk ((how she) or (how some)) ;*".