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

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