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

Try widening your search to All Fields.

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