Perhaps you should try some spelling variations:
"element sampling algorithm" » "element mining algorithm" (Expand Search), "sediment sampling algorithm" (Expand Search), "element mapping algorithm" (Expand Search), "client sampling algorithm" (Expand Search)
"elements upon algorithm" » "elements ppo algorithm" (Expand Search), "elements fusion algorithm" (Expand Search), "elements pso algorithm" (Expand Search), "elements ppm algorithm" (Expand Search)
"elements two algorithms" » "elements _ algorithms" (Expand Search), "elements ml algorithms" (Expand Search), "elements art algorithms" (Expand Search), "elements wt algorithms" (Expand Search), "element te algorithms" (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: (((("elements upon algorithm") OR ("elements two algorithms"))) OR ("element sampling algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elements upon algorithm\") OR (\"elements two algorithms\"))) OR (\"element sampling algorithm\"))".
• Removing quotes may allow a broader search: (((( elements upon algorithm ) OR ( elements two algorithms ))) OR ( element sampling algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements upon algorithm") OR ("elements two algorithms"))) OR ("element sampling algorithm"))*.