Perhaps you should try some spelling variations:
cost sharing » risk sharing, cost savings
formula kong » formula dodgy, formula using, formula how
guan cost » human cost, can cost, iran cost
ii zhang » li zhang, ii chang, ii anhang
xi zhang » li zhang, xiao zhang, bin zhang
yan guan » gan guan, yan yuan, yang guang

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: ((ii zhang) OR (xi zhang)) yan guan cost sharing formula kong (sar OR saur) ;~.
• Adding a wildcard symbol may retrieve word variants: ((ii zhang) or (xi zhang)) yan guan cost sharing formula kong (sar or saur) ;*.