Perhaps you should try some spelling variations:
"modified bayesian optimisation algorithm" » "modified bayesian optimization algorithms", "modified bayesian estimation algorithm", "modified bayesian estimation algorithms", "modified bayesian optimization algorithm"
"modified stochastic optimized algorithms" » "modified stochastic optimization algorithms", "modified stochastic optimized algorithm", "modified stochastic optimizer algorithms"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified stochastic optimized algorithms") OR ("modified bayesian optimisation algorithm"))~.
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