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 size algorithm" » "sediment cosine algorithm" (Expand Search), "sediment five algorithms" (Expand Search), "sediment nine algorithms" (Expand Search)

Try widening your search to All Fields.

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