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

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: (("modified parameter estimation algorithms") OR ("modified static estimation algorithmss"))~.
• Removing quotes may allow a broader search: (( modified parameter estimation algorithms ) or ( modified static estimation algorithmss ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified parameter estimation algorithms") or ("modified static estimation algorithmss"))*.