Perhaps you should try some spelling variations:
"modified notion optimisation algorithm" » "modified notion optimization algorithms", "modified notion estimation algorithm", "modified network optimization algorithm"
"modified over estimation algorithms" » "modified over estimation algorithm", "modified over optimization algorithms", "modified over approximation algorithms", "modified cover estimations algorithms", "modified pose estimation algorithms", "modified sphere estimation algorithms", "modified near estimation algorithms", "modified orca estimation algorithms"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified over estimation algorithms\") OR (\"modified notion optimisation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified over estimation algorithms ) OR ( modified notion optimisation algorithm ))~.
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