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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( parameter estimation algorithmss ) or ( policy optimization algorithms ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( parameter estimation algorithmss ) OR ( policy optimization algorithms ))*.