Perhaps you should try some spelling variations:
"select controls algorithm" » "select control algorithm" (Expand Search), "selected controls algorithm" (Expand Search)
"level using algorithm" » "level cosine algorithm" (Expand Search), "level fusion algorithm" (Expand Search)
"implement based algorithm" » "implemented based algorithm" (Expand Search), "implementing based 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: (((("implement based algorithm") OR ("select controls algorithm"))) OR ("level using algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"implement based algorithm\") OR (\"select controls algorithm\"))) OR (\"level using algorithm\"))".
• Removing quotes may allow a broader search: (((( implement based algorithm ) OR ( select controls algorithm ))) OR ( level using algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("implement based algorithm") OR ("select controls algorithm"))) OR ("level using algorithm"))*.