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