Perhaps you should try some spelling variations:
cost sharing » risk sharing, cost savings
sharing risk » sharing best, during risk
using eu » using e, using ed, using es
how some » how women
ying eu » ying zhu, ying hua
how she » how safe, how shih
zhen » zheng, when, chen

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

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