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