Perhaps you should try some spelling variations:
"elements mining algorithm" » "elements learning algorithm" (Expand Search), "elements means algorithm" (Expand Search), "elements during algorithm" (Expand Search)
"element cnn algorithm" » "element _ algorithm" (Expand Search), "element new algorithm" (Expand Search), "element em algorithm" (Expand Search)
"elemental rl algorithm" » "elemental xrd algorithm" (Expand Search), "elemental iron algorithm" (Expand Search), "elemental ritual algorithm" (Expand Search), "elemental rl algorithms" (Expand Search), "elemental rf algorithm" (Expand Search), "elemental ml algorithms" (Expand Search)

Try widening your search to All Fields.

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