Perhaps you should try some spelling variations:
"modified parameter optimization algorithms" » "modified parameter optimisation algorithm", "modified parameter estimation algorithms", "modified parameter optimized algorithms", "modified parameters optimization algorithms"
"modified quantile estimation algorithm" » "modified adaptive estimation algorithm"

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