Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"when learning adam algorithm" » "when learning mom algorithm", "deep learning adam algorithm", "how learning adam algorithm", "shot learning adam algorithm", "when learning aided algorithm", "when learning a algorithm", "when learning from algorithm"

Try widening your search to All Fields.

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