Perhaps you should try some spelling variations:
estimation algorithmss » estimation algorithm, optimization algorithms
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
parameter estimation » parameter estimates, parameter optimization
same estimation » pose estimation, sphere estimation

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( same estimation algorithmss ) OR ( parameter estimation algorithms ))~".
• Adding a wildcard symbol may retrieve word variants: (( same estimation algorithmss ) OR ( parameter estimation algorithms ))*.