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)
"elements iii algorithm" » "elements ii algorithm" (Expand Search), "elements _ algorithm" (Expand Search), "elements new algorithm" (Expand Search), "elements ices algorithm" (Expand Search), "elements b algorithm" (Expand Search)
"element cnn algorithm" » "element _ algorithm" (Expand Search), "element new algorithm" (Expand Search), "element em 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 iii algorithm") OR ("element cnn algorithm"))) OR ("element mapping algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elements iii algorithm\") OR (\"element cnn algorithm\"))) OR (\"element mapping algorithm\"))".
• Removing quotes may allow a broader search: (((( elements iii algorithm ) OR ( element cnn algorithm ))) OR ( element mapping algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements iii algorithm") OR ("element cnn algorithm"))) OR ("element mapping algorithm"))*.