Perhaps you should try some spelling variations:
"modified parameter estimation algorithms" » "modified parameter estimation algorithm", "modified parameter optimization algorithms", "modified parameter optimisation algorithm", "modified parameter estimates algorithms"
"modified notion estimation algorithmsssssss" » "modified notion estimation algorithmssssss", "modified notion optimization algorithmsssssss", "modified notion optimisation algorithmssssss", "modified motion estimation algorithmsssssss"

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