Perhaps you should try some spelling variations:
"element sampling algorithm" » "element scheduling algorithm" (Expand Search), "elements sampling algorithm" (Expand Search)
"element update algorithm" » "elements update algorithm" (Expand Search), "element updated algorithm" (Expand Search)
"element study algorithm" » "elements study algorithm" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("element sampling algorithm") OR ((("element update algorithm") OR ("element study algorithm"))))~.
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