Perhaps you should try some spelling variations:
"element controls algorithm" » "element control algorithm" (Expand Search), "elements controls algorithm" (Expand Search)
"level coding algorithms" » "level cosine algorithm" (Expand Search), "level colony algorithm" (Expand Search), "level cosine algorithms" (Expand Search), "level colony algorithms" (Expand Search), "level scheduling algorithms" (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: (((("element controls algorithm") OR ("level coding algorithms"))) OR ("neural coding algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element controls algorithm\") OR (\"level coding algorithms\"))) OR (\"neural coding algorithm\"))".
• Removing quotes may allow a broader search: (((( element controls algorithm ) OR ( level coding algorithms ))) OR ( neural coding algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("element controls algorithm") OR ("level coding algorithms"))) OR ("neural coding algorithm"))*.