Perhaps you should try some spelling variations:
"modified objective convolution algorithms" » "modified objective evolution algorithm", "modified objective solution algorithm"
"modified optimal evolution algorithms" » "modified optimal evolution algorithm", "modified optimal solution algorithm", "modified optimal evolutionary algorithm", "modified optimal solution algorithms", "modified time evolution algorithms", "modified thermal evolution algorithms"

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 optimal evolution algorithms") OR ("modified objective convolution algorithms"))~.
• Removing quotes may allow a broader search: (( modified optimal evolution algorithms ) or ( modified objective convolution algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified optimal evolution algorithms") or ("modified objective convolution algorithms"))*.