Perhaps you should try some spelling variations:
"select controls algorithm" » "select control algorithm" (Expand Search), "selected controls algorithm" (Expand Search)
"level coding algorithm" » "level cosine algorithm" (Expand Search), "level colony algorithm" (Expand Search), "level scheduling algorithm" (Expand Search)
"complement _ algorithm" » "implement _ algorithm" (Expand Search), "complementary _ 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 _ algorithm\") OR (\"select controls algorithm\"))) OR (\"level coding algorithm\"))~".
• Removing quotes may allow a broader search: (((( complement _ algorithm ) OR ( select controls algorithm ))) OR ( level coding algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (((("complement _ algorithm") OR ("select controls algorithm"))) OR ("level coding algorithm"))*.