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

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("robust optimisation algorithm") or ((("_ optimizer algorithmss") or ("_ optimized algorithm"))))~.
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• Adding a wildcard symbol may retrieve word variants: (("robust optimisation algorithm") or ((("_ optimizer algorithmss") or ("_ optimized algorithm"))))*.