Perhaps you should try some spelling variations:
"_ optimization algorithms" » "_ estimation algorithms", "_ estimation algorithm", "_ optimized algorithms"
"_ optimisation algorithm" » "_ estimation algorithm", "_ estimation algorithms"
"dose optimized algorithm" » "dose optimized algorithms", "dose optimizer algorithms", "done optimized algorithm", "jose optimized algorithm"

Try widening your search to All Fields.

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