Perhaps you should try some spelling variations:
functions computational » functions computation, function computation, directions computational
programming recursion » programming decision, programming session, programming decisions
using conditional » using conventional, using traditional
recursion array » recursion arrays
array visual » arrays virtual, early visual

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((functions computational) OR (using conditional)) programming recursion array visual~.
• Adding a wildcard symbol may retrieve word variants: ((functions computational) or (using conditional)) programming recursion array visual*.