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)
"settlement data algorithm" » "settlement jaya algorithm" (Expand Search), "settlement deer 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 ("settlement data algorithm"))) OR ("data using algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"improvements ii algorithm\") OR (\"settlement data algorithm\"))) OR (\"data using algorithm\"))".
• Removing quotes may allow a broader search: (((( improvements ii algorithm ) OR ( settlement data algorithm ))) OR ( data using algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("improvements ii algorithm") OR ("settlement data algorithm"))) OR ("data using algorithm"))*.