Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithm, optimized algorithms
estimation algorithms » estimation algorithm, optimisation algorithm, approximation algorithms
policy estimation » policy optimization, pose estimation, motion estimation
risk optimization » robust optimization, _ optimization, game optimization

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 ( risk optimization algorithms ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( policy estimation algorithms ) OR ( risk optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (( policy estimation algorithms ) or ( risk optimization algorithms ))*.