Perhaps you should try some spelling variations:
estimation algorithmss » estimation algorithms, estimation algorithm, optimization algorithms
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
parameter estimation » parameter estimates, parameter optimization
game optimisation » game optimization, stage optimization, _ optimisation

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 ( game optimisation algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( parameter estimation algorithmss ) OR ( game optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( parameter estimation algorithmss ) or ( game optimisation algorithm ))*.