Perhaps you should try some spelling variations:
"elements present algorithm" » "elements presented algorithm" (Expand Search), "elements treatment algorithm" (Expand Search), "elements forest algorithm" (Expand Search)
"element mining algorithm" » "element finding algorithm" (Expand Search), "element making algorithm" (Expand Search), "element training algorithms" (Expand Search), "element mapping algorithm" (Expand Search), "element bonding algorithm" (Expand Search), "element modeling algorithm" (Expand Search)
"element rf algorithm" » "element _ algorithm" (Expand Search), "element ii algorithm" (Expand Search), "element art algorithms" (Expand Search), "element ore algorithm" (Expand Search), "element ree 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 present algorithm") OR ("element rf algorithm"))) OR ("element mining algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elements present algorithm\") OR (\"element rf algorithm\"))) OR (\"element mining algorithm\"))".
• Removing quotes may allow a broader search: (((( elements present algorithm ) OR ( element rf algorithm ))) OR ( element mining algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements present algorithm") OR ("element rf algorithm"))) OR ("element mining algorithm"))*.