Perhaps you should try some spelling variations:
"elements sampling algorithm" » "elements mining algorithm" (Expand Search), "sediment sampling algorithm" (Expand Search), "element mapping algorithm" (Expand Search), "client sampling algorithm" (Expand Search)
"elements tree algorithms" » "elements three algorithms" (Expand Search), "elements other algorithms" (Expand Search), "elements art algorithms" (Expand Search), "elements tthree algorithms" (Expand Search), "elements trl algorithms" (Expand Search), "elements tde algorithms" (Expand Search), "elements ree algorithms" (Expand Search), "elements res algorithms" (Expand Search), "elements create algorithms" (Expand Search)
"element ree algorithms" » "element three algorithms" (Expand Search), "element rl algorithms" (Expand Search), "element de algorithms" (Expand Search), "elements ree algorithms" (Expand Search), "element te algorithms" (Expand Search), "element mesh algorithms" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("elements tree algorithms") OR ("element ree algorithms"))) OR ("elements sampling algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elements tree algorithms\") OR (\"element ree algorithms\"))) OR (\"elements sampling algorithm\"))".
• Removing quotes may allow a broader search: (((( elements tree algorithms ) OR ( element ree algorithms ))) OR ( elements sampling algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements tree algorithms") OR ("element ree algorithms"))) OR ("elements sampling algorithm"))*.