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 rl algorithms" » "element ml algorithms" (Expand Search), "element art algorithms" (Expand Search), "element all algorithms" (Expand Search), "element ore algorithms" (Expand Search), "element _ algorithms" (Expand Search), "element te algorithms" (Expand Search)
"element ree algorithm" » "element tree algorithms" (Expand Search), "element new algorithm" (Expand Search), "element em algorithm" (Expand Search), "elements ree algorithm" (Expand Search), "element te algorithm" (Expand Search), "element mesh algorithm" (Expand Search)

Try widening your search to All Fields.

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