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