Perhaps you should try some spelling variations:
"modified parameter optimization algorithmss" » "modified parameter optimization algorithms", "modified parameter optimisation algorithm", "modified parameter estimation algorithms", "modified parameters optimization algorithmss"
"modified topology estimation algorithm" » "modified topology optimization algorithm"

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