Perhaps you should try some spelling variations:
"modified game optimization algorithmss" » "modified game optimization algorithms", "modified game estimation algorithms", "modified game estimation algorithm", "modified stage optimization algorithmss", "modified qoe optimization algorithmss", "modified market optimization algorithmss", "modified male optimization algorithmss", "modified adam optimization algorithmss"
"modified parameter optimisation algorithm" » "modified parameter optimization algorithm", "modified parameter estimation algorithm", "modified parameter optimization algorithms", "modified parameter estimation algorithms"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified game optimization algorithmss") OR ("modified parameter optimisation algorithm"))~.
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