Perhaps you should try some spelling variations:
practical astronomy » optical astronomy, positional astronomy
astronomy survey » astronomy surveys, astronomy sergey, autonomy survey
astronomy seven » astronomy some, astronomy science, astronomy between
mics practical » ics practical, micro practical, moocs practical
moore nautical » board nautical, mile nautical, moore national
patrick mics » patrick mons, patrick michel, patrick maill

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 mics practical astronomy seven ) OR ( the patrick moore nautical astronomy survey )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick mics practical astronomy seven ) or ( the patrick moore nautical astronomy survey ))*.