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

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