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)
"element data algorithms" » "element jaya algorithm" (Expand Search), "elements data algorithms" (Expand Search)
"data using algorithm" » "data cosine 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 data algorithms\"))) OR (\"data using algorithm\"))~".
• Removing quotes may allow a broader search: (((( improvements cnn algorithm ) OR ( element data algorithms ))) OR ( data using algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (((("improvements cnn algorithm") OR ("element data algorithms"))) OR ("data using algorithm"))*.