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