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