Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
astronomy status » astronomy space, astronomy south
moocs practical » books practical, mics practical, colts practical
mayen practical » man practical, modern practical, seven practical
patrick moocs » patrick moore, patrick mons, patrick moyes
patrick mayen » patrick bayer, patrick madan, patrick moyes

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