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)
"element component algorithm" » "elements component algorithm" (Expand Search), "element components algorithm" (Expand Search)

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 ("element component algorithm"))) OR ("level using algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"complement box algorithm\") OR (\"element component algorithm\"))) OR (\"level using algorithm\"))*".
• Removing quotes may allow a broader search: (((( complement box algorithm ) OR ( element component algorithm ))) OR ( level using algorithm ))*.