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