Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
pose optimisation » _ optimisation, pose estimation, game optimization
qoe optimization » game optimization, _ optimization, stage optimization
game estimation » pose estimation, game 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: "((\"pose optimisation algorithm\") or (\"((game estimation) OR (qoe optimization)) algorithms\"))".
• Removing quotes may allow a broader search: (( pose optimisation algorithm ) or ( ((game estimation) or (qoe optimization)) algorithms )).