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