Perhaps you should try some spelling variations:
"elemental mapping algorithm" » "elemental sampling algorithm" (Expand Search), "elemental matching algorithm" (Expand Search), "elemental mining algorithm" (Expand Search)
"elements ii algorithm" » "elements _ algorithm" (Expand Search), "elements em algorithm" (Expand Search), "elements new algorithm" (Expand Search), "elements b algorithm" (Expand Search), "elements fe algorithm" (Expand Search)
"elements wt algorithm" » "elements _ algorithm" (Expand Search), "elements em algorithm" (Expand Search), "elements rf algorithm" (Expand Search), "elements b algorithm" (Expand Search), "elements ree 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 ii algorithm") OR ("elements wt algorithm"))) OR ("elemental mapping algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elements ii algorithm\") OR (\"elements wt algorithm\"))) OR (\"elemental mapping algorithm\"))".
• Removing quotes may allow a broader search: (((( elements ii algorithm ) OR ( elements wt algorithm ))) OR ( elemental mapping algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements ii algorithm") OR ("elements wt algorithm"))) OR ("elemental mapping algorithm"))*.