Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
parameter estimates » parameter estimation
estimates algorithm » estimation algorithm, estimation algorithms
qoe optimization » game optimization, _ optimization, stage optimization

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: (( parameter estimates algorithm ) OR ( qoe optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( parameter estimates algorithm ) or ( qoe optimization algorithms ))*.