Perhaps you should try some spelling variations:
"modified network optimisation algorithms" » "modified network optimization algorithms", "modified network estimation algorithms", "modified network estimation algorithm", "modified network optimization algorithmss", "modified network estimation algorithmss", "certified network optimisation algorithms", "defined network optimisation algorithms", "modified near 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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