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

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