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

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 algorithm\\") or (\\"((qoe optimisation) OR (game optimization)) algorithm\\"))\"".
• Removing quotes may allow a broader search: (( qoe optimization algorithm ) or ( ((qoe optimisation) OR (game optimization)) algorithm )).