Perhaps you should try some spelling variations:
"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)
"main component algorithm" » "main components 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 (\"main component algorithm\"))) OR (\"level coding algorithm\"))~".
• Removing quotes may allow a broader search: (((( complement _ algorithm ) OR ( main component algorithm ))) OR ( level coding algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (((("complement _ algorithm") OR ("main component algorithm"))) OR ("level coding algorithm"))*.