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

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• Performing a fuzzy search may retrieve terms with similar spellings: (( qoe optimized algorithms ) or ( _ ((estimation algorithms) or (estimation algorithmss)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( qoe optimized algorithms ) OR ( _ ((estimation algorithms) OR (estimation algorithmss)) )).
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