Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"machine learning convolution algorithm" » "machine learning convolution algorithms", "machine learning evolution algorithm", "machine learning solution algorithm"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("machine learning convolution algorithm") or ("modified multiobjective estimation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("machine learning convolution algorithm") OR ("modified multiobjective estimation algorithm")).
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