Perhaps you should try some spelling variations:
"modified parameter estimation algorithmssssss" » "modified parameter estimation algorithms", "modified parameter estimation algorithm", "modified parameter estimates algorithmssssss", "modified parameter optimization algorithmssssss"
"modified static optimization algorithm" » "modified static optimization algorithms", "modified static optimisation algorithm", "modified static estimation algorithm", "modified stage optimization algorithm", "modified stochastic optimization algorithm", "modified staffing optimization algorithm"

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