Perhaps you should try some spelling variations:
"_ optimization algorithms" » "_ optimisation algorithm", "_ optimized algorithms", "_ optimizer algorithms"
"_ estimation algorithms" » "_ optimisation algorithm", "_ approximation 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: "((\"_ optimization algorithms\") OR (((\"qoe estimation algorithm\") OR (\"_ estimation algorithms\"))))~".
• Removing quotes may allow a broader search: (( _ optimization algorithms ) OR ((( qoe estimation algorithm ) OR ( _ estimation algorithms ))))~.
• Adding a wildcard symbol may retrieve word variants: (("_ optimization algorithms") OR ((("qoe estimation algorithm") OR ("_ estimation algorithms"))))*.