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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified policy estimation algorithmss") OR ("modified parameters optimization algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified policy estimation algorithmss\") OR (\"modified parameters optimization algorithms\"))".
• Removing quotes may allow a broader search: (( modified policy estimation algorithmss ) OR ( modified parameters optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified policy estimation algorithmss") OR ("modified parameters optimization algorithms"))*.