Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
optimizer algorithms » optimized algorithms, optimization algorithms
optimized algorithm » optimized algorithms
qoe estimation » pose estimation, _ estimation, cover estimations

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: (( _ ((optimized algorithm) OR (optimizer algorithms)) ) OR ( qoe estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( _ ((optimized algorithm) or (optimizer algorithms)) ) or ( qoe estimation algorithms ))*.