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