Perhaps you should try some spelling variations:
"_ estimation algorithms" » "_ estimation algorithm", "_ optimization algorithms", "_ optimisation algorithm"
"_ optimizer algorithms" » "_ optimized algorithms", "_ optimization algorithms", "_ optimize algorithms", "_ optimise algorithms"
"post optimized algorithm" » "post optimized algorithms", "most optimized algorithm", "cost optimized algorithm"

Try widening your search to All Fields.

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