Perhaps you should try some spelling variations:
"element mining algorithm" » "element learning algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mapping algorithm" (Expand Search), "element bonding 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 zinc 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: (((("elemental zinc algorithm") OR ("element cnn algorithm"))) OR ("element mining algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elemental zinc algorithm\") OR (\"element cnn algorithm\"))) OR (\"element mining algorithm\"))".
• Removing quotes may allow a broader search: (((( elemental zinc algorithm ) OR ( element cnn algorithm ))) OR ( element mining algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elemental zinc algorithm") OR ("element cnn algorithm"))) OR ("element mining algorithm"))*.