Perhaps you should try some spelling variations:
"elements sampling algorithm" » "elements modeling algorithm" (Expand Search), "elements mining algorithm" (Expand Search), "elements matching algorithm" (Expand Search), "client sampling algorithm" (Expand Search), "sediment sampling algorithm" (Expand Search), "element mapping algorithm" (Expand Search)
"element making algorithm" » "element learning algorithm" (Expand Search), "element finding algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mapping algorithm" (Expand Search), "elemental mapping algorithm" (Expand Search), "element modeling algorithm" (Expand Search)
"client needs algorithm" » "client means algorithm" (Expand Search), "client new algorithm" (Expand Search), "client leiden algorithm" (Expand Search), "urgent needs algorithm" (Expand Search), "china needs algorithm" (Expand Search)

Try widening your search to All Fields.

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