Perhaps you should try some spelling variations:
"modified changing optimization algorithms" » "modified changing optimisation algorithm", "modified changing estimation algorithms", "modified changing estimation algorithm", "modified changing optimisation algorithms", "modified changing estimation algorithmss", "modified staffing optimization algorithms", "modified caging optimization algorithms"
"modified parameter optimization algorithm" » "modified parameter optimisation algorithm", "modified parameter estimation algorithm", "modified parameter estimation algorithms", "modified parameters optimization algorithm"

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