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