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 method algorithm" » "element network algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mean algorithm" (Expand Search)
"client search algorithm" » "line search 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 method algorithm") OR ("element sampling algorithm"))) OR ("client search algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element method algorithm\") OR (\"element sampling algorithm\"))) OR (\"client search algorithm\"))".
• Removing quotes may allow a broader search: (((( element method algorithm ) OR ( element sampling algorithm ))) OR ( client search algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("element method algorithm") OR ("element sampling algorithm"))) OR ("client search algorithm"))*.