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