Perhaps you should try some spelling variations:
"modified adaptive estimation algorithms" » "modified adaptive estimation algorithm", "modified adaptive optimization algorithms", "modified adaptive optimisation algorithm", "modified adaptive ventilation algorithms", "modified quantile estimation algorithms", "modified adaptive quantization algorithms", "modified passive estimation algorithms"
"modified notion optimized algorithms" » "modified notion optimized algorithm", "modified notion optimizer algorithms", "modified notion optimization algorithms"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("modified adaptive estimation algorithms") or ("modified notion optimized algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified adaptive estimation algorithms") OR ("modified notion optimized algorithms"))*.
• Removing quotes may allow a broader search: (( modified adaptive estimation algorithms ) or ( modified notion optimized algorithms ))*.