Perhaps you should try some spelling variations:
"modified parameters optimization algorithms" » "modified parameter optimization algorithms", "modified parameter estimation algorithms", "modified parameters optimisation algorithm", "modified parameters estimation algorithms", "modified parameters estimation algorithm"
"modified motion estimation algorithmss" » "modified motion estimation algorithms", "modified motion estimation algorithm", "modified notion estimation algorithmss"

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 parameters optimization algorithms") OR ("modified motion estimation algorithmss"))~.
• Removing quotes may allow a broader search: (( modified parameters optimization algorithms ) or ( modified motion estimation algorithmss ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified parameters optimization algorithms") or ("modified motion estimation algorithmss"))*.