Perhaps you should try some spelling variations:
cost sharing » risk sharing, cost savings
sharing risk » sharing best, during risk
chen tan » chen tain, chen yang, chen jian
tan ying » fan ying, ran ying, tan yang
zhu cost » eu cost
how shih » how six, how she
how shu » how she, how slum

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

• If you are trying to use Boolean operators, they must be ALL CAPS: chen tan ying zhu cost sharing risk ((how shu) OR (how shih)) ;~.
• Adding a wildcard symbol may retrieve word variants: chen tan ying zhu cost sharing risk ((how shu) or (how shih)) ;*.