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