Perhaps you should try some spelling variations:
"modified based optimization algorithms" » "modified based optimisation algorithm", "modified based estimation algorithms", "modified based optimized algorithms", "modified game optimization algorithms", "modified market optimization algorithms", "modified qoe optimization algorithms", "modified male optimization algorithms"
"modified notion estimation algorithm" » "modified motion estimation algorithm"

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