Perhaps you should try some spelling variations:
"element matching algorithm" » "element mining algorithm" (Expand Search), "element sampling algorithm" (Expand Search), "element tracking algorithm" (Expand Search), "element mapping algorithm" (Expand Search), "employment matching algorithm" (Expand Search), "element modeling algorithm" (Expand Search)
"elemental iron algorithm" » "elemental pso algorithm" (Expand Search), "elemental ii algorithm" (Expand Search), "elemental cnn algorithm" (Expand Search)
"elements ppo algorithm" » "elements pso algorithm" (Expand Search), "elements pso algorithms" (Expand Search), "elements two algorithms" (Expand Search), "elements ppm algorithm" (Expand Search), "elements upon algorithm" (Expand Search), "elements _ 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 ppo algorithm") OR ("elemental iron algorithm"))) OR ("element matching algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elements ppo algorithm\") OR (\"elemental iron algorithm\"))) OR (\"element matching algorithm\"))".
• Removing quotes may allow a broader search: (((( elements ppo algorithm ) OR ( elemental iron algorithm ))) OR ( element matching algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements ppo algorithm") OR ("elemental iron algorithm"))) OR ("element matching algorithm"))*.