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