Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm
estimation algorithms » estimation algorithm, optimization algorithms, approximation algorithms
covers estimation » cover estimations, pose estimation, sphere estimation
game optimisation » game optimization, stage optimization, _ optimisation

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: (( covers estimation algorithms ) OR ( game optimisation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( covers estimation algorithms ) or ( game optimisation algorithm ))*.