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)
"element method algorithm" » "element network algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mean algorithm" (Expand Search)
"elements novel algorithm" » "elements forest algorithm" (Expand Search), "elements over algorithm" (Expand Search), "element model algorithm" (Expand Search), "elements involved 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 novel algorithm") OR ((("client sampling algorithm") OR ("element method algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"elements novel algorithm\") OR (((\"client sampling algorithm\") OR (\"element method algorithm\"))))".
• Removing quotes may allow a broader search: (( elements novel algorithm ) OR ((( client sampling algorithm ) OR ( element method algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("elements novel algorithm") OR ((("client sampling algorithm") OR ("element method algorithm"))))*.