Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm"
"modified dorca solution algorithm" » "modified dorca evolution algorithm", "modified dorca convolution algorithms", "modified dorca evolutionary algorithm", "modified orca solution algorithm", "modified norway solution algorithm", "modified drug solution algorithm"

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