Perhaps you should try some spelling variations:
introduction descriptive » introduction disruptive, introduction prescription, introduction describing
introduction description » introduction definition, introduction decision, introduction section
methods recursion » methods recursive, methods decision, method recursive
recursion arrays » recursion versus
arrays forming » array forming, arrays sorting, arrays working

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((introduction descriptive) or (introduction description)) methods recursion arrays forming~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((introduction descriptive) OR (introduction description)) methods recursion arrays forming.
• Adding a wildcard symbol may retrieve word variants: ((introduction descriptive) or (introduction description)) methods recursion arrays forming*.