Perhaps you should try some spelling variations:
"verified network optimization algorithm" » "verified network optimization algorithms", "verified network optimisation algorithm", "verified network estimation algorithm", "certified network optimization algorithm", "defined network optimization algorithm"
"modified notion estimation algorithmss" » "modified notion estimation algorithms", "modified notion estimation algorithm", "modified notion optimization algorithms", "modified motion estimation algorithmss"

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