Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"machines learning convolution algorithms" » "machines learning evolution algorithm", "machines learning solution algorithm", "machine learning convolution algorithms", "active learning convolution algorithms", "mapping learning convolution 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: (("machines learning convolution algorithms") OR ("modified multiobjective estimation algorithm"))~.
• Removing quotes may allow a broader search: (( machines learning convolution algorithms ) or ( modified multiobjective estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("machines learning convolution algorithms") or ("modified multiobjective estimation algorithm"))*.