Perhaps you should try some spelling variations:
"client sampling algorithm" » "client making algorithm" (Expand Search), "client modeling algorithm" (Expand Search), "client mining algorithm" (Expand Search)
"elements tree algorithms" » "elements three algorithms" (Expand Search), "elements art algorithms" (Expand Search), "elements two algorithms" (Expand Search), "elements ree algorithms" (Expand Search), "element ree algorithms" (Expand Search), "elements res algorithms" (Expand Search)
"elements best algorithm" » "elements forest algorithm" (Expand Search), "elements based algorithm" (Expand Search), "elements new algorithm" (Expand Search), "elements res algorithm" (Expand Search), "elements b 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 best algorithm") OR ("elements tree algorithms"))) OR ("client sampling algorithm"))~.
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• Removing quotes may allow a broader search: (((( elements best algorithm ) OR ( elements tree algorithms ))) OR ( client sampling algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements best algorithm") OR ("elements tree algorithms"))) OR ("client sampling algorithm"))*.