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

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified parameter optimization algorithm") OR ("modified policy estimation algorithmss"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified parameter optimization algorithm\") OR (\"modified policy estimation algorithmss\"))".
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