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

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified bayesian estimation algorithms") OR ("modified allocation optimization algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified bayesian estimation algorithms\") OR (\"modified allocation optimization algorithm\"))*".
• Removing quotes may allow a broader search: (( modified bayesian estimation algorithms ) OR ( modified allocation optimization algorithm ))*.