Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
policy optimization » topology optimization
policy estimation » pose estimation, motion estimation, pulses estimation
policy simulation » device simulation, plant simulation

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( policy optimization algorithm ) or ( ((policy estimation) OR (policy simulation)) algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( policy optimization algorithm ) OR ( ((policy estimation) OR (policy simulation)) algorithm )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( policy optimization algorithm ) or ( ((policy estimation) OR (policy simulation)) algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( policy optimization algorithm ) or ( ((policy estimation) OR (policy simulation)) algorithm ))*.