Perhaps you should try some spelling variations:
"complex system algorithm" » "complex swarm algorithm" (Expand Search), "complaint system algorithm" (Expand Search)
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural colony algorithm" (Expand Search), "neural scheduling algorithm" (Expand Search)
"element each algorithm" » "element search algorithm" (Expand Search), "element jaya algorithm" (Expand Search), "elements each 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 each algorithm") OR ("complex system algorithm"))) OR ("neural coding algorithm"))~.
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