Perhaps you should try some spelling variations:
"element sampling algorithm" » "element scheduling algorithm" (Expand Search), "elements sampling algorithm" (Expand Search)
"recent data algorithm" » "recent jaya algorithm" (Expand Search), "recent deer algorithm" (Expand Search)
"element cnn algorithm" » "element rd algorithm" (Expand Search), "element colony algorithm" (Expand Search), "element cosine algorithm" (Expand Search), "elements cnn 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: (((("recent data algorithm") OR ("element cnn algorithm"))) OR ("element sampling algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"recent data algorithm\") OR (\"element cnn algorithm\"))) OR (\"element sampling algorithm\"))".
• Removing quotes may allow a broader search: (((( recent data algorithm ) OR ( element cnn algorithm ))) OR ( element sampling algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("recent data algorithm") OR ("element cnn algorithm"))) OR ("element sampling algorithm"))*.