Perhaps you should try some spelling variations:
cronicas generales » cronica general, teorias generales, cronicas mineras
espacial cronicas » espacial cronica, espada cronicas, espana cronica
generales python » generales por
python computer » methods computer
programs* » programas*

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

• Performing a fuzzy search may retrieve terms with similar spellings: espacial cronicas generales python computer (programs* OR programa*)~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "espacial cronicas generales python computer (programs* OR programa*)".
• Adding a wildcard symbol may retrieve word variants: espacial cronicas generales python computer (programs* OR programa*)*.