Perhaps you should try some spelling variations:
cost sharing » risk sharing, cost savings
zhang yang » zhang yan, zhang fang, zhang ying
yang yang » wang yang, wang yan
sharing a » sharing _
yang use » range use, yang jie, yang yue
use cost » user cost, user costs, use case
wong yue » wang yue

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: zhang yang yang use cost sharing a ((wong yue) OR (hong yu)) ;~.
• Adding a wildcard symbol may retrieve word variants: zhang yang yang use cost sharing a ((wong yue) or (hong yu)) ;*.