Perhaps you should try some spelling variations:
"element controls algorithm" » "element control algorithm" (Expand Search), "elements controls algorithm" (Expand Search)
"level coding algorithm" » "level cosine algorithm" (Expand Search), "level colony algorithm" (Expand Search), "level scheduling algorithm" (Expand Search)
"complement box algorithm" » "complement rd algorithm" (Expand Search), "implement box algorithm" (Expand Search), "complementary box algorithm" (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"complement box algorithm\") OR (\"element controls algorithm\"))) OR (\"level coding algorithm\"))~".
• Removing quotes may allow a broader search: (((( complement box algorithm ) OR ( element controls algorithm ))) OR ( level coding algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (((("complement box algorithm") OR ("element controls algorithm"))) OR ("level coding algorithm"))*.