Perhaps you should try some spelling variations:
astronomy surveying » astronomy during
astronomy survives » astronomy survey, astronomy surveys, astronomy studies
astronomy services » gastronomy services, autonomy services, gastronomic services
optical astronomy » nautical astronomy
optics astronomy » opticks astronomy, genetics astronomy, physics astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy studies
core positional » case positional, core position, pure positional
corsi spherical » case spherical, coma spherical, quasi spherical
patrick color » patrick colm, patrick corr, patrick bolton
color optical » solar optical, over optical, color options
patrick corsi » patrick cozzi, patrick coggi, patrick corr
moore optics » fibre optics
patrick mein » patrick mkie, patrick madan, patrick m
mein optical » main optical, moon optical, gain optical
patrick core » patrick corr, patrick coyle, patrick case

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 moore optics astronomy services ) OR ( the patrick mein optical astronomy survives ))) OR ((((( the patrick core positional astronomy surveying ) OR ( the patrick color optical astronomy series ))) OR ( the patrick corsi spherical astronomy series )))).
• Adding a wildcard symbol may retrieve word variants: (((( the patrick moore optics astronomy services ) or ( the patrick mein optical astronomy survives ))) or ((((( the patrick core positional astronomy surveying ) or ( the patrick color optical astronomy series ))) or ( the patrick corsi spherical astronomy series ))))*.