Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
kelly practical » key practical, daily practical, easy practical
mons practical » coins practical, boss practical, lens practical
patrick kelly » patrick allo
patrick mons » patrick moyes, patrick bond, patrick mpondo

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 mons practical astronomy surveys ) OR ( the patrick kelly practical astronomy surveys )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick mons practical astronomy surveys ) or ( the patrick kelly practical astronomy surveys ))*.