Perhaps you should try some spelling variations:
estimation algorithmss » estimation algorithm, optimization algorithms
attributes estimation » attribute optimization
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
parameters estimation » 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: (( attributes estimation algorithms ) OR ( parameters estimation algorithmss ))~.
• Adding a wildcard symbol may retrieve word variants: (( attributes estimation algorithms ) or ( parameters estimation algorithmss ))*.