Perhaps you should try some spelling variations:
"element tracking algorithm" » "element tracking algorithms" (Expand Search), "element training algorithms" (Expand Search), "element making algorithm" (Expand Search), "movement tracking algorithm" (Expand Search), "sleep tracking algorithm" (Expand Search), "element strain algorithm" (Expand Search)
"element based algorithms" » "element based algorithm" (Expand Search), "engagement based algorithms" (Expand Search)
"element study algorithm" » "element wsindy algorithm" (Expand Search), "element td3 algorithm" (Expand Search), "element seu algorithm" (Expand Search), "relevant study algorithm" (Expand Search), "present study algorithm" (Expand Search), "recent study algorithm" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("element tracking algorithm") OR ((("element based algorithms") OR ("element study algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"element tracking algorithm\") OR (((\"element based algorithms\") OR (\"element study algorithm\"))))".
• Removing quotes may allow a broader search: (( element tracking algorithm ) OR ((( element based algorithms ) OR ( element study algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("element tracking algorithm") OR ((("element based algorithms") OR ("element study algorithm"))))*.