Perhaps you should try some spelling variations:
"text processing algorithm" » "text modeling algorithm" (Expand Search), "text routing algorithm" (Expand Search), "text tracking algorithm" (Expand Search), "time processing algorithm" (Expand Search), "post processing algorithm" (Expand Search), "waste processing algorithm" (Expand Search)
"element method algorithm" » "element network algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mean algorithm" (Expand Search)
"presence data algorithm" » "presence data algorithms" (Expand Search), "presence update algorithm" (Expand Search), "presence atlas algorithm" (Expand Search), "prevalence data algorithm" (Expand Search)

Try widening your search to All Fields.

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