Perhaps you should try some spelling variations:
"cluster sampling algorithm" » "cluster making algorithm" (Expand Search), "cluster modeling algorithm" (Expand Search), "cluster mining algorithm" (Expand Search)
"element novel algorithm" » "element forest algorithm" (Expand Search), "element model algorithm" (Expand Search), "element ore algorithm" (Expand Search), "elements over algorithm" (Expand Search)
"sediment from algorithm" » "sediment frog algorithms" (Expand Search), "sediment pso algorithm" (Expand Search), "sediment rf algorithm" (Expand Search), "sediment flux 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: (((("cluster sampling algorithm") OR ("sediment from algorithm"))) OR ("element novel algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"cluster sampling algorithm\") OR (\"sediment from algorithm\"))) OR (\"element novel algorithm\"))".
• Removing quotes may allow a broader search: (((( cluster sampling algorithm ) OR ( sediment from algorithm ))) OR ( element novel algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("cluster sampling algorithm") OR ("sediment from algorithm"))) OR ("element novel algorithm"))*.