Perhaps you should try some spelling variations:
"modified multiobjective optimisation algorithm" » "modified multiobjective optimization algorithm", "modified objective optimization algorithm", "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective estimation algorithms"
"core learning emotion algorithm" » "core learning evolution algorithm", "core learning estimation algorithm", "core learning predation algorithm", "core learning method algorithm", "how learning emotion algorithm"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("core learning emotion algorithm") or ("modified multiobjective optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("core learning emotion algorithm") OR ("modified multiobjective optimisation algorithm")).
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