Perhaps you should try some spelling variations:
"present training algorithms" » "present learning algorithms" (Expand Search), "present learning algorithm" (Expand Search), "pressure training algorithms" (Expand Search), "pre training algorithms" (Expand Search), "person training algorithms" (Expand Search)
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural modeling algorithm" (Expand Search), "neural finding algorithm" (Expand Search)
"element rf algorithm" » "element _ algorithm" (Expand Search), "element ii algorithm" (Expand Search), "element art algorithms" (Expand Search), "element ore algorithm" (Expand Search), "element ree algorithm" (Expand Search)

Try widening your search to All Fields.

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