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: (("modified multiobjective estimation algorithm") or ("mapping learning convolution algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified multiobjective estimation algorithm") OR ("mapping learning convolution algorithms"))*.
• Removing quotes may allow a broader search: (( modified multiobjective estimation algorithm ) or ( mapping learning convolution algorithms ))*.