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)
"elemental zinc algorithm" » "elemental ii algorithm" (Expand Search), "elemental iii algorithm" (Expand Search), "elemental hip algorithm" (Expand Search)
"elements cnn algorithm" » "elements _ algorithm" (Expand Search), "elements new algorithm" (Expand Search), "elements em algorithm" (Expand Search), "elements ices algorithm" (Expand Search), "elements upon algorithm" (Expand Search), "elements crcy algorithm" (Expand Search)

Try widening your search to All Fields.

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