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