Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy survives » astronomy survey, astronomy studies
astronomy surveys » astronomy survey, astronomy surveying, astronomy sergey
course practical » yourself practical, concise practical, care practical
mouse practical » rouses practical, more practical, use practical
patrick course » patrick corsi, patrick case, patrick count
patrick mouse » patrick moore, patrick mons, patrick cousot

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( the patrick mouse practical astronomy survives ) OR ( the patrick course practical astronomy surveys )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick mouse practical astronomy survives ) or ( the patrick course practical astronomy surveys ))*.