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