Perhaps you should try some spelling variations:
sharing risk » sharing best, during risk
cost sharing » risk sharing, cost savings
cheng zhang » cheng han, zhen zhang, chen zheng
zhang fang » zhang fan, zhang zhang, zhang yan
using eu » using e, using ed, using es
ying eu » ying zhu, ying hua
how shu » how she, how shih, how slum

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

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