Perhaps you should try some spelling variations:
estimation algorithmss » estimation algorithm, optimization algorithms
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
robust estimation » robust optimization, pose estimation, risk estimation
qoe estimation » pose estimation, _ estimation, cover estimations

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: (( robust estimation algorithmss ) OR ( qoe estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( robust estimation algorithmss ) or ( qoe estimation algorithms ))*.