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