Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"modified df solutions algorithm" » "modified df solution algorithm", "modified df evolution algorithm", "modified df evolutionary algorithm", "modified _ solutions algorithm", "modified up solutions algorithm", "modified _ solution algorithm", "modified adam solutions algorithm", "modified bi1 solutions algorithm"

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