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

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