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

Try widening your search to All Fields.

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