Perhaps you should try some spelling variations:
"client sampling algorithm" » "client mining algorithm" (Expand Search), "sediment sampling algorithm" (Expand Search)
"elements under algorithm" » "elements new algorithm" (Expand Search), "elements tide algorithm" (Expand Search), "elements other algorithms" (Expand Search), "elements tended algorithm" (Expand Search)
"client means algorithm" » "client search algorithm" (Expand Search), "client 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 under algorithm") OR ((("client sampling algorithm") OR ("client means algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"elements under algorithm\") OR (((\"client sampling algorithm\") OR (\"client means algorithm\"))))".
• Removing quotes may allow a broader search: (( elements under algorithm ) OR ((( client sampling algorithm ) OR ( client means algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("elements under algorithm") OR ((("client sampling algorithm") OR ("client means algorithm"))))*.