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

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