Perhaps you should try some spelling variations:
"modified parameter estimation algorithmssss" » "modified parameter estimation algorithms", "modified parameter estimates algorithmssss", "modified parameter optimization algorithmssss"
"modified network estimation algorithm" » "modified network optimization algorithm", "certified network estimation algorithm", "defined network estimation algorithm", "modified near estimation algorithm"

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