Perhaps you should try some spelling variations:
"element sampling algorithm" » "element scheduling algorithm" (Expand Search), "elements sampling algorithm" (Expand Search)
"recent mining algorithm" » "recent cosine algorithm" (Expand Search)
"element rf algorithm" » "element rd algorithm" (Expand Search), "element _ algorithms" (Expand Search), "elements rf algorithm" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element sampling algorithm\") OR (\"recent mining algorithm\"))) OR (\"element rf algorithm\"))~".
• Removing quotes may allow a broader search: (((( element sampling algorithm ) OR ( recent mining algorithm ))) OR ( element rf algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (((("element sampling algorithm") OR ("recent mining algorithm"))) OR ("element rf algorithm"))*.