Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
parameters optimization » parameter optimization, parameter estimation
optimization algorithm » optimisation 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (( qoe optimization algorithms ) or ( parameters optimization algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( qoe optimization algorithms ) OR ( parameters optimization algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( qoe optimization algorithms ) or ( parameters optimization algorithm ))*.