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

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("_ optimized algorithms") or ((("_ estimation algorithms") or ("qoe optimisation algorithm"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("_ optimized algorithms") OR ((("_ estimation algorithms") OR ("qoe optimisation algorithm")))).
• Removing quotes may allow a broader search: (( _ optimized algorithms ) or ((( _ estimation algorithms ) or ( qoe optimisation algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("_ optimized algorithms") or ((("_ estimation algorithms") or ("qoe optimisation algorithm"))))*.