Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation 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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