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

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