Perhaps you should try some spelling variations:
"modified parameter estimation algorithmsss" » "modified parameter estimation algorithm", "modified parameter estimation algorithmss", "modified parameter optimization algorithmsss", "modified parameter optimisation algorithmss", "modified parameter estimates algorithmsss"
"modified objective estimation algorithms" » "modified objective estimation algorithm", "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective allocation 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 objective estimation algorithms") OR ("modified parameter estimation algorithmsss"))~.
• Removing quotes may allow a broader search: (( modified objective estimation algorithms ) or ( modified parameter estimation algorithmsss ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective estimation algorithms") or ("modified parameter estimation algorithmsss"))*.