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)
"elements ii algorithm" » "elements _ algorithm" (Expand Search), "elements new algorithm" (Expand Search), "elements pso algorithm" (Expand Search), "elements b algorithm" (Expand Search), "elements wt algorithm" (Expand Search)
"elements em algorithm" » "elements new algorithm" (Expand Search), "elements _ algorithm" (Expand Search), "elements _ algorithms" (Expand Search), "elements ree algorithm" (Expand Search), "elements ppm algorithm" (Expand Search), "elements res algorithm" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("elements ii algorithm") OR ("elements em algorithm"))) OR ("element sampling algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elements ii algorithm\") OR (\"elements em algorithm\"))) OR (\"element sampling algorithm\"))".
• Removing quotes may allow a broader search: (((( elements ii algorithm ) OR ( elements em algorithm ))) OR ( element sampling algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements ii algorithm") OR ("elements em algorithm"))) OR ("element sampling algorithm"))*.