Perhaps you should try some spelling variations:
optimization algorithms » estimation algorithm, optimized algorithms, optimizer algorithms
optimisation algorithm » estimation algorithm
estimation algorithms » estimation algorithm, approximation algorithms
qoe optimisation » qoe optimization, _ optimisation, game 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 ((optimization algorithms) or (estimation algorithms)) ) or ( qoe optimisation algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( game ((optimization algorithms) OR (estimation algorithms)) ) OR ( qoe optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( game ((optimization algorithms) or (estimation algorithms)) ) or ( qoe optimisation algorithm ))*.