Perhaps you should try some spelling variations:
optimization algorithmssss » optimization algorithms, optimisation algorithm
attributes optimization » attribute optimization
parameters estimation » parameter estimation, parameter estimates, parameter optimization
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm

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 optimization algorithmssss ) OR ( parameters estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( attributes optimization algorithmssss ) or ( parameters estimation algorithms ))*.