Perhaps you should try some spelling variations:
"element sampling algorithm" » "element scheduling algorithm" (Expand Search), "elements sampling algorithm" (Expand Search)
"elemental xrd algorithm" » "elemental rd algorithm" (Expand Search), "elementary xrd algorithm" (Expand Search), "elements xrd algorithm" (Expand Search), "elementsal xrd algorithm" (Expand Search)
"elemental pso algorithm" » "elementary pso algorithm" (Expand Search), "elements pso algorithm" (Expand Search), "elementsal pso algorithm" (Expand Search)

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

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