Perhaps you should try some spelling variations:
"complement system algorithm" » "complement swarm algorithm" (Expand Search), "implement system algorithm" (Expand Search), "complementary system algorithm" (Expand Search)
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural colony algorithm" (Expand Search), "neural scheduling algorithm" (Expand Search)
"second rd algorithm" » "second _ algorithms" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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