Perhaps you should try some spelling variations:
estimation algorithmss » estimation algorithms, estimation algorithm, optimization algorithms
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
qoe optimization » game optimization, _ optimization, stage optimization
risk 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: (( risk estimation algorithmss ) OR ( qoe optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( risk estimation algorithmss ) or ( qoe optimization algorithm ))*.