Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"mapping learning convolution algorithms" » "mapping learning evolution algorithm", "mapping learning solution algorithm", "machine learning convolution algorithms", "enabling learning convolution algorithms"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("mapping learning convolution algorithms") or ("modified multiobjective estimation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("mapping learning convolution algorithms") OR ("modified multiobjective estimation algorithm")).
• Removing quotes may allow a broader search: (( mapping learning convolution algorithms ) or ( modified multiobjective estimation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("mapping learning convolution algorithms") or ("modified multiobjective estimation algorithm"))*.