Perhaps you should try some spelling variations:
"element sampling algorithm" » "element scheduling algorithm" (Expand Search)
"data routing algorithm" » "data cosine algorithm" (Expand Search), "data using algorithm" (Expand Search)
"elements fe algorithm" » "elements rd algorithm" (Expand Search), "elements deer algorithm" (Expand Search), "elements _ algorithms" (Expand Search), "elements _ algorithm" (Expand Search), "elementi per 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 fe algorithm") OR ((("element sampling algorithm") OR ("data routing algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"elements fe algorithm\") OR (((\"element sampling algorithm\") OR (\"data routing algorithm\"))))".
• Removing quotes may allow a broader search: (( elements fe algorithm ) OR ((( element sampling algorithm ) OR ( data routing algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("elements fe algorithm") OR ((("element sampling algorithm") OR ("data routing algorithm"))))*.