Perhaps you should try some spelling variations:
"modified adaptive optimisation algorithms" » "modified adaptive optimisation algorithm", "modified adaptive optimization algorithms", "modified adaptive estimation algorithm", "modified passive optimisation algorithms"
"modified bayesian estimation algorithms" » "modified bayesian estimation algorithm", "modified bayesian optimization algorithms", "modified bayesian optimisation algorithm"

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