Perhaps you should try some spelling variations:
"element sampling algorithm" » "element mining algorithm" (Expand Search), "sediment sampling algorithm" (Expand Search), "element mapping algorithm" (Expand Search), "client sampling algorithm" (Expand Search)
"element ml algorithms" » "element _ algorithms" (Expand Search), "element _ algorithm" (Expand Search), "element te algorithms" (Expand Search), "element g algorithms" (Expand Search)
"element de algorithms" » "element _ algorithms" (Expand Search), "element rl algorithms" (Expand Search), "element five algorithms" (Expand Search), "element te algorithms" (Expand Search), "element ree 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: (((("element ml algorithms") OR ("element de algorithms"))) OR ("element sampling algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element ml algorithms\") OR (\"element de algorithms\"))) OR (\"element sampling algorithm\"))".
• Removing quotes may allow a broader search: (((( element ml algorithms ) OR ( element de algorithms ))) OR ( element sampling algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("element ml algorithms") OR ("element de algorithms"))) OR ("element sampling algorithm"))*.