Perhaps you should try some spelling variations:
"element mapping algorithm" » "element sampling algorithm" (Expand Search), "element matching algorithm" (Expand Search), "element mining algorithm" (Expand Search), "elemental mapping algorithm" (Expand Search), "element modeling algorithm" (Expand Search)
"element three algorithms" » "element based algorithms" (Expand Search), "element art algorithms" (Expand Search), "element two algorithms" (Expand Search), "element thtree algorithmss" (Expand Search), "element thnew algorithms" (Expand Search), "element them algorithms" (Expand Search), "element te algorithms" (Expand Search), "elements ree algorithms" (Expand Search), "element ore algorithms" (Expand Search)
"element ree algorithm" » "element tree algorithms" (Expand Search), "element new algorithm" (Expand Search), "element em algorithm" (Expand Search), "elements ree algorithm" (Expand Search), "element te algorithm" (Expand Search), "element mesh algorithm" (Expand Search)

Try widening your search to All Fields.

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