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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("qoe estimation algorithms") OR ("_ estimation algorithms"))) or ("qoe optimized algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("qoe estimation algorithms") OR ("_ estimation algorithms"))) OR ("qoe optimized algorithm")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"qoe estimation algorithms\") OR (\"_ estimation algorithms\"))) or (\"qoe optimized algorithm\"))".
• Removing quotes may allow a broader search: (((( qoe estimation algorithms ) OR ( _ estimation algorithms ))) or ( qoe optimized algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("qoe estimation algorithms") OR ("_ estimation algorithms"))) or ("qoe optimized algorithm"))*.