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

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