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