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

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