Perhaps you should try some spelling variations:
"modified effect estimation algorithms" » "modified effect estimation algorithm", "modified effect optimization algorithms", "modified effect optimisation algorithm", "modified effect investigation 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 objective allocation algorithm\") OR (\"modified effect estimation algorithms\"))~".
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