Perhaps you should try some spelling variations:
"element sampling algorithm" » "element scheduling algorithm" (Expand Search)
"elements fe algorithm" » "elements rd algorithm" (Expand Search), "elements deer algorithm" (Expand Search), "elements _ algorithms" (Expand Search), "elements _ algorithm" (Expand Search), "elementi per algorithm" (Expand Search)
"elements tree algorithms" » "elements three algorithms" (Expand Search), "elements free 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 tree algorithms") OR ("elements fe algorithm"))) OR ("element sampling algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elements tree algorithms\") OR (\"elements fe algorithm\"))) OR (\"element sampling algorithm\"))".
• Removing quotes may allow a broader search: (((( elements tree algorithms ) OR ( elements fe algorithm ))) OR ( element sampling algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements tree algorithms") OR ("elements fe algorithm"))) OR ("element sampling algorithm"))*.