Perhaps you should try some spelling variations:
"elements tracking algorithm" » "elements learning algorithm" (Expand Search), "elements processing algorithm" (Expand Search), "movement tracking algorithm" (Expand Search)
"client mining algorithm" » "client learning algorithm" (Expand Search), "client means algorithm" (Expand Search)
"client needs algorithm" » "client means algorithm" (Expand Search), "client new algorithm" (Expand Search), "client leiden algorithm" (Expand Search), "china needs algorithm" (Expand Search), "urgent needs 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: (("elements tracking algorithm") OR ((("client mining algorithm") OR ("client needs algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"elements tracking algorithm\") OR (((\"client mining algorithm\") OR (\"client needs algorithm\"))))".
• Removing quotes may allow a broader search: (( elements tracking algorithm ) OR ((( client mining algorithm ) OR ( client needs algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("elements tracking algorithm") OR ((("client mining algorithm") OR ("client needs algorithm"))))*.