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

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"_ estimation algorithms\") OR (\"qoe estimation algorithm\"))) OR (\"same optimized algorithm\"))~".
• Removing quotes may allow a broader search: (((( _ estimation algorithms ) OR ( qoe estimation algorithm ))) OR ( same optimized algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ estimation algorithms") OR ("qoe estimation algorithm"))) OR ("same optimized algorithm"))*.