Perhaps you should try some spelling variations:
"level coding algorithm" » "level cosine algorithm" (Expand Search), "level modeling algorithm" (Expand Search), "level finding algorithm" (Expand Search), "level according algorithm" (Expand Search), "level using algorithm" (Expand Search)
"complements ppo algorithm" » "complements upon algorithm" (Expand Search), "complements pso algorithm" (Expand Search), "complements two algorithms" (Expand Search), "complements _ algorithm" (Expand Search)
"elements cscap algorithm" » "elements cc3d algorithm" (Expand Search), "elements ipca algorithm" (Expand Search), "elements custom algorithm" (Expand Search), "elements crcy algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("complements ppo algorithm") OR ("elements cscap algorithm"))) OR ("level coding algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"complements ppo algorithm\") OR (\"elements cscap algorithm\"))) OR (\"level coding algorithm\"))".
• Removing quotes may allow a broader search: (((( complements ppo algorithm ) OR ( elements cscap algorithm ))) OR ( level coding algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("complements ppo algorithm") OR ("elements cscap algorithm"))) OR ("level coding algorithm"))*.