Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
optimized algorithmss » optimized algorithms, optimized algorithm, optimizer algorithms
parameter estimation » parameter estimates, parameter optimization
parameter optimized » parameter 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 algorithms ) or ( parameter optimized algorithmss ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( parameter estimation algorithms ) OR ( parameter optimized algorithmss ))*.