Perhaps you should try some spelling variations:
"modified bayesian estimation algorithmss" » "modified bayesian estimation algorithm", "modified bayesian optimization algorithms", "modified bayesian estimation algorithms", "modified bayesian optimization algorithmss", "modified bayesian optimisation algorithms"
"modified parameters estimation algorithms" » "modified parameter estimation algorithms", "modified parameter estimates algorithms", "modified parameter optimization algorithms", "modified parameters estimation algorithm", "modified parameters optimization algorithms", "modified parameters optimisation algorithm"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified bayesian estimation algorithmss") OR ("modified parameters estimation algorithms"))*.
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