Perhaps you should try some spelling variations:
generative programming » imperative programming, declarative programming, interactive programming
reactive programming » recursive programming, declarative programming, imperative programming
regression concepts » regression forests, egress concepts, extension concepts
concepts citrus » concepts chris, concepts cited, concepts critiques

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: information ((generative programming) OR (reactive programming)) regression concepts citrus~.
• Adding a wildcard symbol may retrieve word variants: information ((generative programming) or (reactive programming)) regression concepts citrus*.