Perhaps you should try some spelling variations:
"complement fusion algorithm" » "complement fixation algorithm" (Expand Search), "confinement fusion algorithm" (Expand Search), "complex fusion algorithm" (Expand Search), "complement lasso algorithm" (Expand Search)
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural modeling algorithm" (Expand Search), "neural finding algorithm" (Expand Search)
"element tree algorithms" » "element three algorithms" (Expand Search), "element art algorithms" (Expand Search), "element two algorithms" (Expand Search), "element ree algorithms" (Expand Search), "element te algorithms" (Expand Search), "element ore algorithms" (Expand Search)

Try widening your search to All Fields.

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