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 tended algorithm" » "elements tested algorithms" (Expand Search), "elements leiden algorithm" (Expand Search), "elements tide algorithm" (Expand Search)
"elements over algorithm" » "elements novel algorithm" (Expand Search), "elements other algorithms" (Expand Search), "elements new algorithm" (Expand Search), "elements under algorithm" (Expand Search), "elements mges algorithm" (Expand Search), "events over algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("client sampling algorithm") OR ((("elements over algorithm") OR ("elements tended algorithm"))))~.
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• Removing quotes may allow a broader search: (( client sampling algorithm ) OR ((( elements over algorithm ) OR ( elements tended algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("client sampling algorithm") OR ((("elements over algorithm") OR ("elements tended algorithm"))))*.