Perhaps you should try some spelling variations:
introduction description » introduction definition, introduction decision, introduction section
description methods » description method, descriptive methods, transcription methods
methods recursive » method recursive, methods receptive, networks recursive
array forming » array arcing, array formats, array string

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: introduction description methods recursive ((((array fermi) OR (array forming))) or (array format))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: introduction description methods recursive ((((array fermi) OR (array forming))) OR (array format)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "introduction description methods recursive ((((array fermi) OR (array forming))) or (array format))".
• Adding a wildcard symbol may retrieve word variants: introduction description methods recursive ((((array fermi) OR (array forming))) or (array format))*.