Perhaps you should try some spelling variations:
"_ optimization algorithm" » "_ optimization algorithms", "_ estimation algorithms", "_ optimized algorithm"
"_ optimisation algorithm" » "_ optimization algorithms", "_ estimation algorithms"
"qoe estimation algorithm" » "pose estimation algorithm", "_ estimation algorithm", "cover estimations 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: (((("_ optimization algorithm") OR ("_ optimisation algorithm"))) OR ("qoe estimation algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"_ optimization algorithm\") OR (\"_ optimisation algorithm\"))) or (\"qoe estimation algorithm\"))~".
• Removing quotes may allow a broader search: (((( _ optimization algorithm ) OR ( _ optimisation algorithm ))) or ( qoe estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ optimization algorithm") OR ("_ optimisation algorithm"))) or ("qoe estimation algorithm"))*.