Perhaps you should try some spelling variations:
"element matching algorithm" » "element mining algorithm" (Expand Search), "element sampling algorithm" (Expand Search), "element tracking algorithm" (Expand Search), "element mapping algorithm" (Expand Search), "employment matching algorithm" (Expand Search), "element modeling algorithm" (Expand Search)
"element zinc algorithm" » "element ii algorithm" (Expand Search), "element cnn algorithm" (Expand Search), "element iii algorithm" (Expand Search), "elemental zinc algorithm" (Expand Search)
"elemental xrd algorithm" » "elemental iron algorithm" (Expand Search), "elemental rf algorithm" (Expand Search), "elemental rl algorithm" (Expand Search), "elemental wsd algorithm" (Expand Search)

Try widening your search to All Fields.

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