Perhaps you should try some spelling variations:
"element sampling algorithm" » "sediment sampling algorithm" (Expand Search), "element mapping algorithm" (Expand Search), "client sampling algorithm" (Expand Search)
"element mining algorithm" » "element learning algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mapping algorithm" (Expand Search), "element bonding algorithm" (Expand Search), "element modeling algorithm" (Expand Search)
"elements two algorithms" » "elements _ algorithms" (Expand Search), "elements ml algorithms" (Expand Search), "elements art algorithms" (Expand Search), "elements wt algorithms" (Expand Search), "elements upon algorithms" (Expand Search)

Try widening your search to All Fields.

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