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)
"complementary cc3d algorithm" » "complementary rd algorithm" (Expand Search)
"element rl algorithm" » "element rd algorithm" (Expand Search), "element carlo algorithm" (Expand Search), "element _ algorithms" (Expand Search), "elements rl 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: (((("complementary cc3d algorithm") OR ("element rl algorithm"))) OR ("level coding algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"complementary cc3d algorithm\") OR (\"element rl algorithm\"))) OR (\"level coding algorithm\"))".
• Removing quotes may allow a broader search: (((( complementary cc3d algorithm ) OR ( element rl algorithm ))) OR ( level coding algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("complementary cc3d algorithm") OR ("element rl algorithm"))) OR ("level coding algorithm"))*.