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

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