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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( game optimisation algorithm ) or ( ((qoe optimisation) OR (qoe optimization)) algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( game optimisation algorithm ) OR ( ((qoe optimisation) OR (qoe optimization)) algorithm )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( game optimisation algorithm ) or ( ((qoe optimisation) OR (qoe optimization)) algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( game optimisation algorithm ) or ( ((qoe optimisation) OR (qoe optimization)) algorithm ))*.