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

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: (( sphere optimisation algorithm ) OR ( parameters estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( sphere optimisation algorithm ) or ( parameters estimation algorithms ))*.