Perhaps you should try some spelling variations:
"modified adaptive estimation algorithmssss" » "modified adaptive estimation algorithm", "modified adaptive estimation algorithmsss", "modified adaptive optimization algorithmssss", "modified adaptive optimisation algorithmsss", "modified adaptive ventilation algorithmssss", "modified quantile estimation algorithmssss", "modified adaptive quantization algorithmssss", "modified passive estimation algorithmssss"
"modified parameter estimation algorithms" » "modified parameter estimation algorithm", "modified parameter optimization algorithms", "modified parameter optimisation algorithm", "modified parameter estimates algorithms"

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