Perhaps you should try some spelling variations:
"element learning algorithm" » "element learning algorithms" (Expand Search), "student learning algorithm" (Expand Search)
"models routing algorithm" » "models cosine algorithm" (Expand Search), "model routing algorithm" (Expand Search)
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural colony algorithm" (Expand Search), "neural scheduling algorithm" (Expand Search)

Try widening your search to All Fields.

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