Perhaps you should try some spelling variations:
"element tracking algorithm" » "element learning algorithm" (Expand Search), "element processing algorithm" (Expand Search), "movement tracking algorithm" (Expand Search), "sleep tracking algorithm" (Expand Search), "element mapping algorithm" (Expand Search)
"element based algorithms" » "element based algorithm" (Expand Search)
"element swarm algorithm" » "element search algorithm" (Expand Search), "element software 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 tracking algorithm") OR ("element swarm algorithm"))) OR ("element based algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element tracking algorithm\") OR (\"element swarm algorithm\"))) OR (\"element based algorithms\"))".
• Removing quotes may allow a broader search: (((( element tracking algorithm ) OR ( element swarm algorithm ))) OR ( element based algorithms )).
• Adding a wildcard symbol may retrieve word variants: (((("element tracking algorithm") OR ("element swarm algorithm"))) OR ("element based algorithms"))*.