Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
sphere optimization » sphere estimation, stage optimization, response optimization
game optimization » stage optimization, qoe optimization, market optimization
qoe optimisation » qoe optimization, _ optimisation, _ 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: (( ((qoe optimisation) OR (game optimization)) algorithm ) OR ( sphere optimization algorithms ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((qoe optimisation) OR (game optimization)) algorithm ) or ( sphere optimization algorithms ))~".
• Adding a wildcard symbol may retrieve word variants: (( ((qoe optimisation) OR (game optimization)) algorithm ) or ( sphere optimization algorithms ))*.