Perhaps you should try some spelling variations:
"implement routine algorithm" » "implement routing algorithm" (Expand Search), "implement cosine algorithm" (Expand Search), "implement retinex algorithm" (Expand Search)
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural modeling algorithm" (Expand Search), "neural finding algorithm" (Expand Search)
"event free algorithm" » "event tree algorithms" (Expand Search), "event forest algorithm" (Expand Search), "event three algorithms" (Expand Search), "events free algorithm" (Expand Search), "even free algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("event free algorithm") OR ((("implement routine algorithm") OR ("neural coding algorithm"))))~.
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• Removing quotes may allow a broader search: (( event free algorithm ) OR ((( implement routine algorithm ) OR ( neural coding algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("event free algorithm") OR ((("implement routine algorithm") OR ("neural coding algorithm"))))*.