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

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