Perhaps you should try some spelling variations:
"_ optimization algorithm" » "_ optimization algorithms", "_ optimisation algorithm", "_ estimation algorithm"
"_ optimize algorithms" » "_ optimized algorithms", "_ optimizer algorithms", "_ optimized algorithm", "_ optimise algorithms"
"qoe approximation algorithms" » "one approximation algorithms", "time approximation algorithms", "_ approximation 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: (("qoe approximation algorithms") or ((("_ optimize algorithms") or ("_ optimization algorithm"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("qoe approximation algorithms") OR ((("_ optimize algorithms") OR ("_ optimization algorithm")))).
• Removing quotes may allow a broader search: (( qoe approximation algorithms ) or ((( _ optimize algorithms ) or ( _ optimization algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("qoe approximation algorithms") or ((("_ optimize algorithms") or ("_ optimization algorithm"))))*.