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

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

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