Perhaps you should try some spelling variations:
"qoe optimisation algorithm" » "qoe optimization algorithms", "qoe optimization algorithm", "_ optimisation algorithm", "game optimization algorithm"
"_ estimation algorithms" » "_ optimization algorithms", "_ 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.

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