Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm"
"modified df predictor algorithm" » "modified df predators algorithm", "modified df predation algorithm", "modified _ predictor algorithm", "modified a predictor algorithm", "modified adam predictor algorithm", "modified bi1 predictor algorithm"

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