Perhaps you should try some spelling variations:
"current sampling algorithm" » "current making algorithm" (Expand Search), "current modeling algorithm" (Expand Search), "current mining algorithm" (Expand Search), "current smoking algorithm" (Expand Search), "client sampling algorithm" (Expand Search)
"neural coding algorithm" » "neural cosine algorithm" (Expand Search), "neural modeling algorithm" (Expand Search), "neural finding algorithm" (Expand Search)
"represent sem algorithm" » "represent mean algorithm" (Expand Search), "represent open algorithm" (Expand Search), "represent site algorithm" (Expand Search), "represent em algorithm" (Expand Search), "represent svm algorithm" (Expand Search), "represent seu algorithm" (Expand Search)

Try widening your search to All Fields.

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