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

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: (((("_ optimizer algorithms") OR ("_ optimization algorithms"))) OR ("qoe estimation algorithms"))~.
• Removing quotes may allow a broader search: (((( _ optimizer algorithms ) or ( _ optimization algorithms ))) or ( qoe estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ optimizer algorithms") or ("_ optimization algorithms"))) or ("qoe estimation algorithms"))*.