Perhaps you should try some spelling variations:
astronomy surveying » astronomy during
astronomy survives » astronomy survey, astronomy surveys, astronomy studies
optical astronomy » nautical astronomy, spherical astronomy
mons positional » monkey positional, points positional, holds positional
patrick modes » patrick moyes, trick modes, patrick moore's
modes optical » models optical, mode optical, model optical
patrick mons » patrick moyes, patrick bond, patrick mpondo

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 mons positional astronomy survives ) OR ( the patrick modes optical astronomy surveying )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick mons positional astronomy survives ) or ( the patrick modes optical astronomy surveying ))*.