Perhaps you should try some spelling variations:
introduction comprehensive » introduction comparative
comprehensive programming » comprehensive program, comprehensive programs, comprehension programmed
revision concepts » vision concepts, visions concepts, supervision concepts
sensor concepts » sensor concept, tensor concepts, sensors concept

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 programming ((sensor concepts) or (revision concepts)) cited~.
• If you are trying to use Boolean operators, they must be ALL CAPS: introduction comprehensive programming ((sensor concepts) OR (revision concepts)) cited.
• Adding a wildcard symbol may retrieve word variants: introduction comprehensive programming ((sensor concepts) or (revision concepts)) cited*.