Perhaps you should try some spelling variations:
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural modeling algorithm" (Expand Search), "neural finding algorithm" (Expand Search)
"experiments box algorithm" » "experiments b algorithm" (Expand Search), "experiments show algorithm" (Expand Search), "experiments _ algorithm" (Expand Search), "experiments best algorithm" (Expand Search), "experiments ii algorithm" (Expand Search)
"elements ppo algorithm" » "elements pso algorithm" (Expand Search), "elements two algorithms" (Expand Search), "elements _ algorithm" (Expand Search), "elements ppm algorithm" (Expand Search), "elements upon algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("experiments box algorithm") OR ("elements ppo algorithm"))) OR ("neural coding algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"experiments box algorithm\") OR (\"elements ppo algorithm\"))) OR (\"neural coding algorithm\"))".
• Removing quotes may allow a broader search: (((( experiments box algorithm ) OR ( elements ppo algorithm ))) OR ( neural coding algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("experiments box algorithm") OR ("elements ppo algorithm"))) OR ("neural coding algorithm"))*.