Perhaps you should try some spelling variations:
"element sampling algorithm" » "element mining algorithm" (Expand Search), "sediment sampling algorithm" (Expand Search), "element mapping algorithm" (Expand Search), "client sampling algorithm" (Expand Search)
"element data algorithms" » "element art algorithms" (Expand Search), "element all algorithms" (Expand Search), "element de algorithms" (Expand Search), "relevant data algorithms" (Expand Search), "movement data algorithms" (Expand Search), "present data algorithms" (Expand Search)
"element rf algorithm" » "element _ algorithm" (Expand Search), "element em algorithm" (Expand Search), "element ii algorithm" (Expand Search), "element ree algorithm" (Expand Search), "element ore algorithm" (Expand Search)

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