Perhaps you should try some spelling variations:
introduction comparative » production comparative, introduction corporate, introduction cognitive
programming sensor » programming session, programming sno2, programming support
programming errors » programming effort, programming reactors, programming entropy
concept car » concept a

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

• Performing a fuzzy search may retrieve terms with similar spellings: introduction comparative ((programming sensor) OR (programming errors)) concept car~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "introduction comparative ((programming sensor) OR (programming errors)) concept car".
• Adding a wildcard symbol may retrieve word variants: introduction comparative ((programming sensor) OR (programming errors)) concept car*.