Perhaps you should try some spelling variations:
"complex systems algorithm" » "complex systematic algorithm" (Expand Search), "complex custom algorithm" (Expand Search), "complex sssgm algorithm" (Expand Search)
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural modeling algorithm" (Expand Search), "neural finding algorithm" (Expand Search)
"element atlas algorithm" » "element anbs algorithm" (Expand Search), "element abs algorithm" (Expand Search), "element adonis algorithm" (Expand Search), "element data algorithm" (Expand Search)

Try widening your search to All Fields.

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