Perhaps you should try some spelling variations:
introduction description » introduction definition, introduction decision, introduction section
description methods » description method, descriptive methods, transcription methods
methods recursion » methods recursive, methods decision, method recursive
recursion arrays » recursion versus
arrays forward » ways forward, delays forward, pathways forward

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 recursion arrays forward~.
• Adding a wildcard symbol may retrieve word variants: introduction description methods recursion arrays forward*.