Perhaps you should try some spelling variations:
"elemental mapping algorithm" » "elemental making algorithm" (Expand Search), "elemental mining algorithm" (Expand Search), "elemental learning algorithm" (Expand Search), "elements mapping algorithm" (Expand Search)
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural modeling algorithm" (Expand Search), "neural finding algorithm" (Expand Search)
"element mdem algorithms" » "element ml algorithms" (Expand Search), "element em algorithm" (Expand Search), "element tree algorithms" (Expand Search), "element model algorithms" (Expand Search), "elements mges algorithms" (Expand Search), "element te 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 mdem algorithms") OR ((("elemental mapping algorithm") OR ("neural coding algorithm"))))~.
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• Removing quotes may allow a broader search: (( element mdem algorithms ) OR ((( elemental mapping algorithm ) OR ( neural coding algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("element mdem algorithms") OR ((("elemental mapping algorithm") OR ("neural coding algorithm"))))*.