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

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