Perhaps you should try some spelling variations:
"element mapping algorithm" » "element sampling algorithm" (Expand Search), "element matching algorithm" (Expand Search), "element mining algorithm" (Expand Search), "elemental mapping algorithm" (Expand Search), "element modeling algorithm" (Expand Search)
"element ipso algorithm" » "element pso algorithm" (Expand Search), "element pso algorithms" (Expand Search), "element ppo algorithm" (Expand Search), "element mesh 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.

You may be able to get more results by adjusting your search query.

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