Perhaps you should try some spelling variations:
"improvements cnn algorithm" » "improvement _ algorithm" (Expand Search), "improvements rd algorithm" (Expand Search), "improvements colony algorithm" (Expand Search), "improvements cosine algorithm" (Expand Search)
"data using algorithm" » "data cosine algorithm" (Expand Search)
"element update algorithm" » "elements update algorithm" (Expand Search), "element updated 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: "((((\"improvements cnn algorithm\") OR (\"element update algorithm\"))) OR (\"data using algorithm\"))~".
• Removing quotes may allow a broader search: (((( improvements cnn algorithm ) OR ( element update algorithm ))) OR ( data using algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (((("improvements cnn algorithm") OR ("element update algorithm"))) OR ("data using algorithm"))*.