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

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

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