Perhaps you should try some spelling variations:
"element sampling algorithm" » "element scheduling algorithm" (Expand Search), "elements sampling algorithm" (Expand Search)
"element _ algorithm" » "elements _ algorithm" (Expand Search)
"movement tracking algorithm" » "movement training algorithm" (Expand Search), "movement taking algorithm" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"element _ algorithm\") OR (((\"movement tracking algorithm\") OR (\"element sampling algorithm\"))))~".
• Removing quotes may allow a broader search: (( element _ algorithm ) OR ((( movement tracking algorithm ) OR ( element sampling algorithm ))))~.
• Adding a wildcard symbol may retrieve word variants: (("element _ algorithm") OR ((("movement tracking algorithm") OR ("element sampling algorithm"))))*.