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