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

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