Perhaps you should try some spelling variations:
optimization algorithms » estimation algorithms, estimation algorithm, optimized algorithms
optimization algorithm » estimation algorithm, estimation algorithms, optimized algorithm
optimisation algorithm » estimation algorithm, estimation algorithms
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: (( qoe optimization algorithm ) or ( _ ((optimisation algorithm) OR (optimization algorithms)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( qoe optimization algorithm ) OR ( _ ((optimisation algorithm) OR (optimization algorithms)) ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( qoe optimization algorithm ) or ( _ ((optimisation algorithm) OR (optimization algorithms)) ))*".