Perhaps you should try some spelling variations:
"level using algorithm" » "level cosine algorithm" (Expand Search), "level fusion algorithm" (Expand Search)
"complement box algorithm" » "complement rd algorithm" (Expand Search), "implement box algorithm" (Expand Search), "complementary box algorithm" (Expand Search)
"elements component algorithm" » "elements components 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: (((("complement box algorithm") OR ("elements component algorithm"))) OR ("level using algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"complement box algorithm\") OR (\"elements component algorithm\"))) OR (\"level using algorithm\"))".
• Removing quotes may allow a broader search: (((( complement box algorithm ) OR ( elements component algorithm ))) OR ( level using algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("complement box algorithm") OR ("elements component algorithm"))) OR ("level using algorithm"))*.