Perhaps you should try some spelling variations:
"_ optimization algorithms" » "_ optimisation algorithm", "_ estimation algorithms", "_ estimation algorithm"
"dong optimized algorithms" » "dong optimizer algorithms", "dong optimizer algorithmss", "cong optimized algorithms", "dung optimized algorithms"
"one optimized algorithm" » "one optimizer algorithms", "_ optimized algorithm"

Try widening your search to All Fields.

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