Perhaps you should try some spelling variations:
"modified bi1 optimisation algorithms" » "modified bi1 optimization algorithms", "modified bi1 estimation algorithms", "modified bi1 estimation algorithm", "modified bi1 optimization algorithmss", "modified bi1 estimation algorithmss", "modified _ optimisation algorithms", "modified _ optimization algorithms", "modified qoe 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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