Perhaps you should try some spelling variations:
"qoe optimization algorithmss" » "qoe optimization algorithms", "qoe optimisation algorithm", "qoe estimation algorithms", "qoe optimization algorithmsss", "qoe optimisation algorithmss", "qoe estimation algorithmss", "game optimization algorithmss", "_ optimization algorithmss", "stage optimization algorithmss"
"parameters optimization algorithm" » "parameter optimization algorithm", "parameter estimation algorithm", "parameters optimization algorithms", "parameters optimisation algorithm", "parameters estimation algorithm"

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