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

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