Perhaps you should try some spelling variations:
functions conditional » functions functional, functional conditioning, functions computational
programming recursion » programming decision, programming session, programming decisions
programming defining » programming designing, programming learning, programming reasoning
basics teens » basics tools, basics truss

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 conditional ((programming recursion) OR (programming defining)) basics teens~.
• Adding a wildcard symbol may retrieve word variants: functions conditional ((programming recursion) or (programming defining)) basics teens*.