Perhaps you should try some spelling variations:
introduction comprehensive » introduction comparative
programming entropy » programming energy, programming correntropy, programming esop
programming perl » programming pearls, programming part, programming paul
concepts karen » concepts care, concepts cases, concepts case

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 entropy) OR (programming perl)) concepts karen~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "introduction comprehensive ((programming entropy) OR (programming perl)) concepts karen".
• Adding a wildcard symbol may retrieve word variants: introduction comprehensive ((programming entropy) OR (programming perl)) concepts karen*.