Perhaps you should try some spelling variations:
"modified static optimisation algorithmss" » "modified static optimisation algorithm", "modified static estimation algorithms", "modified static estimation algorithm", "modified static optimization algorithmss", "modified stage optimization algorithmss", "modified stochastic optimization algorithmss"
"modified objective optimization algorithms" » "modified objective optimisation algorithm", "modified objective estimation algorithms", "modified objective estimation algorithm", "modified multiobjective optimization algorithms"

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