Perhaps you should try some spelling variations:
introduction detection » introduction deception, introduction selection, introduction detecting
detection methods » detection method, extraction methods, collection methods
methods recursive » method recursive, methods receptive, networks recursive
array formulas » area formulas, harrop formulas, array format
array formats » array format, assay formats, ready formats

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• Performing a fuzzy search may retrieve terms with similar spellings: introduction detection methods recursive ((array formats) or (array formulas))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: introduction detection methods recursive ((array formats) OR (array formulas)).
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