Perhaps you should try some spelling variations:
"modified changing optimized algorithms" » "modified changing optimized algorithm", "modified changing optimizer algorithms", "modified changing optimization algorithms", "modified choosing optimizer algorithms", "modified caging optimized 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 changing optimized algorithms\") OR (\"modified objective allocation algorithm\"))~".
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