Perhaps you should try some spelling variations:
"element mapping algorithm" » "element sampling algorithm" (Expand Search), "element matching algorithm" (Expand Search), "element learning algorithm" (Expand Search), "elemental mapping algorithm" (Expand Search), "element modeling algorithm" (Expand Search)
"element mining algorithm" » "element learning algorithm" (Expand Search), "element means algorithm" (Expand Search), "element bonding algorithm" (Expand Search), "element modeling algorithm" (Expand Search)
"sediment edna algorithm" » "sediment fedsam algorithm" (Expand Search), "sediment means algorithm" (Expand Search), "sediment wgcna algorithm" (Expand Search)

Try widening your search to All Fields.

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