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