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)
"client means algorithm" » "client search algorithm" (Expand Search), "client needs algorithm" (Expand Search)
"elements wt algorithms" » "elements art algorithms" (Expand Search), "elements two algorithms" (Expand Search), "elements ml algorithms" (Expand Search), "elements _ algorithms" (Expand Search), "elements b algorithms" (Expand Search), "elements fe 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 wt algorithms") OR ((("element sampling algorithm") OR ("client means algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"elements wt algorithms\") OR (((\"element sampling algorithm\") OR (\"client means algorithm\"))))".
• Removing quotes may allow a broader search: (( elements wt algorithms ) OR ((( element sampling algorithm ) OR ( client means algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("elements wt algorithms") OR ((("element sampling algorithm") OR ("client means algorithm"))))*.