Perhaps you should try some spelling variations:
"parameter optimisation algorithm" » "parameter optimization algorithm", "parameter optimization algorithms", "parameter estimation algorithm", "parameter estimation algorithms"
"parameter estimation algorithmssssssssssssssssss" » "parameter estimates algorithmssssssssssssssssss", "parameter optimization algorithmssssssssssssssssss"

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: (("parameter optimisation algorithm") OR ("parameter estimation algorithmssssssssssssssssss"))~.
• Removing quotes may allow a broader search: (( parameter optimisation algorithm ) or ( parameter estimation algorithmssssssssssssssssss ))~.
• Adding a wildcard symbol may retrieve word variants: (("parameter optimisation algorithm") or ("parameter estimation algorithmssssssssssssssssss"))*.