Perhaps you should try some spelling variations:
"element matching algorithms" » "element matching algorithm" (Expand Search), "element pacing algorithms" (Expand Search), "element making algorithm" (Expand Search), "employment matching algorithms" (Expand Search), "element modeling algorithms" (Expand Search), "element within algorithms" (Expand Search)
"element mapping algorithm" » "element making algorithm" (Expand Search), "element mining algorithm" (Expand Search), "element learning algorithm" (Expand Search), "elemental mapping algorithm" (Expand Search), "element modeling algorithm" (Expand Search), "argument mapping algorithm" (Expand Search)
"element rl algorithms" » "element ml algorithms" (Expand Search), "element rl algorithm" (Expand Search), "element art algorithms" (Expand Search), "element ore algorithms" (Expand Search), "element ree algorithms" (Expand Search), "element _ algorithms" (Expand Search)

Try widening your search to All Fields.

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