Perhaps you should try some spelling variations:
introduction comprehensive » introduction comparative
information comprehension » introduction comprehension, information imprecision, instruction comprehensive
problems session » problem session, problems series
session concepts » seasian concepts, tension concepts, succession concepts
concepts case » concepts cases, concepts a, 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: ((introduction comprehensive) or (information comprehension)) problems session concepts case~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((introduction comprehensive) OR (information comprehension)) problems session concepts case.
• Adding a wildcard symbol may retrieve word variants: ((introduction comprehensive) or (information comprehension)) problems session concepts case*.