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

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified parameter estimation algorithmssss\") OR (\"modified bayesian estimation algorithms\"))~".
• Removing quotes may allow a broader search: (( modified parameter estimation algorithmssss ) OR ( modified bayesian estimation algorithms ))~.
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