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

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified parameters estimation algorithms") or ("modified stochastic estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified parameters estimation algorithms") OR ("modified stochastic estimation algorithms")).
• Removing quotes may allow a broader search: (( modified parameters estimation algorithms ) or ( modified stochastic estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified parameters estimation algorithms") or ("modified stochastic estimation algorithms"))*.