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

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