Perhaps you should try some spelling variations:
"modified df evolutionary algorithm" » "modified df evolution algorithm", "modified df solution algorithm", "modified _ evolutionary algorithm", "modified adam evolutionary algorithm", "modified bi1 evolutionary algorithm"
"modified objective optimisation algorithm" » "modified objective optimization algorithm", "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective estimation algorithm", "modified objective estimation algorithms"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified df evolutionary algorithm\") OR (\"modified objective optimisation algorithm\"))~".
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