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 motion optimized algorithms" » "modified motion optimized algorithm", "modified motion optimizer algorithms", "modified motion optimization algorithms", "modified notion optimized algorithms"

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 motion optimized algorithms") or ("modified parameter estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified motion optimized algorithms") OR ("modified parameter estimation algorithms")).
• Removing quotes may allow a broader search: (( modified motion optimized algorithms ) or ( modified parameter estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified motion optimized algorithms") or ("modified parameter estimation algorithms"))*.