Perhaps you should try some spelling variations:
cost sharing » risk sharing, cost savings
sharing risk » sharing best, during risk
chen zhang » cheng zhang, zhen zhang, chen zheng
zhang ying » zhang ming, zhang jing, zhang ping
ying der » ding der
der cost » oder cost, user cost, debt cost
how shu » how shih, how slum
how she » how some, how safe, how shih

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "chen zhang ying der cost sharing risk ((how shu) OR (how she)) ;~".
• Adding a wildcard symbol may retrieve word variants: chen zhang ying der cost sharing risk ((how shu) OR (how she)) ;*.