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

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