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)
"events over algorithm" » "events novel algorithm" (Expand Search), "events other algorithms" (Expand Search), "events new algorithm" (Expand Search), "events per algorithm" (Expand Search), "events after algorithm" (Expand Search)
"elements fe algorithm" » "elements new algorithm" (Expand Search), "elements de algorithms" (Expand Search), "elements seu algorithm" (Expand Search), "elements ree algorithm" (Expand Search), "elements res algorithm" (Expand Search), "elements uce algorithm" (Expand Search)

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