Perhaps you should try some spelling variations:
"complementary auction algorithm" » "complementary detection algorithm" (Expand Search)
"level coding algorithm" » "level cosine algorithm" (Expand Search), "level colony algorithm" (Expand Search), "level scheduling algorithm" (Expand Search)
"element rf algorithm" » "element rd algorithm" (Expand Search), "element _ algorithms" (Expand Search), "elements rf algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("complementary auction algorithm") OR ("element rf algorithm"))) OR ("level coding algorithm"))~.
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• Removing quotes may allow a broader search: (((( complementary auction algorithm ) OR ( element rf algorithm ))) OR ( level coding algorithm )).
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