Perhaps you should try some spelling variations:
optical astronomy » nautical astronomy, spherical astronomy, positional astronomy
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
patrick topics » tricky topics
topics optical » optics optical, photonics optical
moore nautical » mile nautical, moore national, some nautical
board nautical » board practical, board national, board neutral

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 topics optical astronomy surveys ) OR ( the patrick ((moore nautical) OR (board nautical)) astronomy surveys )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( the patrick topics optical astronomy surveys ) or ( the patrick ((moore nautical) OR (board nautical)) astronomy surveys ))".
• Adding a wildcard symbol may retrieve word variants: (( the patrick topics optical astronomy surveys ) or ( the patrick ((moore nautical) OR (board nautical)) astronomy surveys ))*.