Perhaps you should try some spelling variations:
"modified objective convolution algorithms" » "modified objective evolution algorithm", "modified objective solution algorithm"
"modified location estimation algorithms" » "modified location estimation algorithm", "modified location optimization algorithms", "modified location optimisation algorithm", "modified motion estimation algorithms", "modified carbon estimation algorithms"

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