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

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"qoe optimization algorithms\\") or (\\"((game estimation) OR (game optimization)) algorithm\\"))\"".
• Removing quotes may allow a broader search: (( qoe optimization algorithms ) or ( ((game estimation) OR (game optimization)) algorithm )).