Perhaps you should try some spelling variations:
"_ optimization algorithm" » "_ optimization algorithms", "_ estimation algorithms", "_ optimized algorithm"
"_ optimisation algorithm" » "_ optimization algorithms", "_ estimation algorithms"
"jose estimation algorithm" » "pose estimation algorithm", "risk estimation algorithm", "cover estimations algorithm"

Try widening your search to All Fields.

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