Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
evolution algorithm » solution algorithm, evolutionary algorithm, convolution algorithms
learning evolution » learning convolution, learning emotion
qoe estimation » pose estimation, _ estimation, cover estimations
modified qoe » modified male, modified _, modified bi1

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( modified qoe estimation algorithms ) or ( machine learning evolution algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified qoe estimation algorithms ) OR ( machine learning evolution algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( modified qoe estimation algorithms ) or ( machine learning evolution algorithm ))*.