Perhaps you should try some spelling variations:
astronomy surveys » astronomy surveying, astronomy survives, astronomy sergey
optical astronomy » spherical astronomy, positional astronomy
astronomy survey » astronomy sergey, autonomy survey, astronomy surveying
moraes nautical » moraes practical
patrick moraes » patrick moyes, patrick moore's, patrick moore
patrick moocs » patrick moore, patrick mons, patrick moyes
moocs optical » moon optical, topics optical, cmos optical

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