Perhaps you should try some spelling variations:
instruction comprehensive » introduction comprehensive, introduction comprehension, constructive comprehension
programming tutorials » programming tutorial, programming theories, programming tools
programming robust » programming problem, programming project, programming process
concepts cases » concepts chapter

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

• Performing a fuzzy search may retrieve terms with similar spellings: instruction comprehensive ((programming tutorials) or (programming robust)) concepts cases~.
• If you are trying to use Boolean operators, they must be ALL CAPS: instruction comprehensive ((programming tutorials) OR (programming robust)) concepts cases.
• Adding a wildcard symbol may retrieve word variants: instruction comprehensive ((programming tutorials) or (programming robust)) concepts cases*.