Perhaps you should try some spelling variations:
"element matching algorithm" » "element mining algorithm" (Expand Search), "element sampling algorithm" (Expand Search), "element tracking algorithm" (Expand Search), "element mapping algorithm" (Expand Search), "employment matching algorithm" (Expand Search), "element modeling algorithm" (Expand Search)
"element swarm algorithm" » "element search algorithm" (Expand Search), "element software algorithm" (Expand Search)
"element mean algorithm" » "element means algorithm" (Expand Search), "element new algorithm" (Expand Search), "element em algorithm" (Expand Search), "element mesh algorithm" (Expand Search), "element te algorithm" (Expand Search), "latent mean 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 mean algorithm") OR ("element swarm algorithm"))) OR ("element matching algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element mean algorithm\") OR (\"element swarm algorithm\"))) OR (\"element matching algorithm\"))".
• Removing quotes may allow a broader search: (((( element mean algorithm ) OR ( element swarm algorithm ))) OR ( element matching algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("element mean algorithm") OR ("element swarm algorithm"))) OR ("element matching algorithm"))*.