Perhaps you should try some spelling variations:
"modified quantile estimation algorithms" » "modified quantile estimation algorithm", "modified quantile optimization algorithms", "modified quantile optimisation algorithm", "modified adaptive estimation algorithms"
"modified objective allocation algorithm" » "modified objective estimation algorithm", "modified objective evolution algorithm", "modified objective predation algorithm"

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