Perhaps you should try some spelling variations:
"image tracking algorithm" » "image tracking algorithms" (Expand Search), "image training algorithms" (Expand Search), "image making algorithm" (Expand Search), "time tracking algorithm" (Expand Search), "face tracking algorithm" (Expand Search), "fate tracking algorithm" (Expand Search)
"elements method algorithm" » "elements network algorithm" (Expand Search), "elements means algorithm" (Expand Search), "elements mean algorithm" (Expand Search), "element method algorithm" (Expand Search)
"present data algorithm" » "present data algorithms" (Expand Search), "present update algorithm" (Expand Search), "present atlas algorithm" (Expand Search), "presence data algorithm" (Expand Search), "present day algorithm" (Expand Search), "recent data algorithm" (Expand Search)

Try widening your search to All Fields.

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