Perhaps you should try some spelling variations:
"element sampling algorithm" » "element making algorithm" (Expand Search), "element modeling algorithm" (Expand Search), "element mining algorithm" (Expand Search), "sediment sampling algorithm" (Expand Search), "client sampling algorithm" (Expand Search), "element mapping algorithm" (Expand Search)
"sleep learning algorithm" » "sleep learning algorithms" (Expand Search), "deep learning algorithm" (Expand Search), "1_deep learning algorithm" (Expand Search), "2_deep learning algorithm" (Expand Search)
"element em algorithm" » "element new algorithm" (Expand Search), "element _ algorithm" (Expand Search), "element ii algorithm" (Expand Search), "element ree algorithm" (Expand Search), "element g algorithm" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("element em algorithm") OR ((("element sampling algorithm") OR ("sleep learning algorithm"))))~.
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• Removing quotes may allow a broader search: (( element em algorithm ) OR ((( element sampling algorithm ) OR ( sleep learning algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("element em algorithm") OR ((("element sampling algorithm") OR ("sleep learning algorithm"))))*.