Perhaps you should try some spelling variations:
"element learning algorithm" » "element learning algorithms" (Expand Search), "student learning algorithm" (Expand Search)
"elemental cnn algorithm" » "elemental rd algorithm" (Expand Search), "elemental colony algorithm" (Expand Search), "elemental cosine algorithm" (Expand Search), "elementary cnn algorithm" (Expand Search), "elements cnn algorithm" (Expand Search)
"elemental pso algorithm" » "elementary pso algorithm" (Expand Search), "elements pso 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 pso algorithm") OR ("elemental cnn algorithm"))) OR ("element learning algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elemental pso algorithm\") OR (\"elemental cnn algorithm\"))) OR (\"element learning algorithm\"))".
• Removing quotes may allow a broader search: (((( elemental pso algorithm ) OR ( elemental cnn algorithm ))) OR ( element learning algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elemental pso algorithm") OR ("elemental cnn algorithm"))) OR ("element learning algorithm"))*.