Perhaps you should try some spelling variations:
"present tracking algorithm" » "present tracking algorithms" (Expand Search), "present training algorithms" (Expand Search), "present making algorithm" (Expand Search), "represents tracking algorithm" (Expand Search), "preserving tracking algorithm" (Expand Search), "movement tracking algorithm" (Expand Search)
"element method algorithm" » "element network algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mean algorithm" (Expand Search)
"element rf algorithm" » "element _ algorithm" (Expand Search), "element ii algorithm" (Expand Search), "element art algorithms" (Expand Search), "element ore algorithm" (Expand Search), "element ree algorithm" (Expand Search)

You may be able to get more results by adjusting your search query.

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