Perhaps you should try some spelling variations:
"students learning algorithm" » "students learning algorithms" (Expand Search), "student learning algorithm" (Expand Search)
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural modeling algorithm" (Expand Search), "neural finding algorithm" (Expand Search)
"present study algorithm" » "present wsindy algorithm" (Expand Search), "present td3 algorithm" (Expand Search), "present seu algorithm" (Expand Search)

Try widening your search to All Fields.

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