Perhaps you should try some spelling variations:
functions programming » functional programming, foundations programming, functions programmed
structure functions » structure function
definitions process » definition process, definitions access, definitions proofs
definitions sources » definitions causes, definitions concepts

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: structure functions programming ((definitions process) OR (definitions sources)) citrus~.
• Adding a wildcard symbol may retrieve word variants: structure functions programming ((definitions process) or (definitions sources)) citrus*.