Perhaps you should try some spelling variations:
"element tracking algorithm" » "element processing algorithm" (Expand Search), "movement tracking algorithm" (Expand Search), "sleep tracking algorithm" (Expand Search), "element mapping algorithm" (Expand Search)
"agent learning algorithm" » "agent learning algorithms" (Expand Search), "student learning algorithm" (Expand Search)
"client mining algorithm" » "client means algorithm" (Expand Search)

Try widening your search to All Fields.

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

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