Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, positional astronomy
optical astronomy » nautical astronomy, spherical astronomy, positional astronomy
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
coins practical » its practical, aris practical, coin practice
patrick moraes » patrick moyes, patrick moore's, patrick moore
moraes optical » modes optical, cores optical, morais optimal
patrick coins » patrick count, patrick cain, patrick chin

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