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