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 estimation » pose estimation, _ estimation, cover estimations

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

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