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

Try widening your search to All Fields.

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