Perhaps you should try some spelling variations:
"modified notion optimization algorithms" » "modified notion optimisation algorithm", "modified notion estimation algorithms", "modified notion estimation algorithm", "modified notion optimisation algorithms", "modified notion estimation algorithmss", "modified network optimization algorithms", "modified policy optimization algorithms", "modified allocation optimization algorithms"
"modified _ optimization algorithm" » "modified _ optimisation algorithm", "modified _ estimation algorithm", "modified _ estimation algorithms"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified _ optimization algorithm\") OR (\"modified notion optimization algorithms\"))~".
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