Perhaps you should try some spelling variations:
optical astronomy » nautical astronomy, spherical astronomy, positional astronomy
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
patrick moocs » patrick moore, patrick mons, patrick moore's
patrick moyes » patrick keyes, patrick mayen, patrick mons
patrick key » patrick kelly, patrick kenny, patrick keyes
key optical » ray optical, why optical, ary 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) OR (patrick moyes)) optical astronomy surveys ) OR ( the patrick key optical astronomy surveys )).
• Adding a wildcard symbol may retrieve word variants: (( the ((patrick moocs) or (patrick moyes)) optical astronomy surveys ) or ( the patrick key optical astronomy surveys ))*.