Perhaps you should try some spelling variations:
astronomy studies » astronomy study, economy studies, astronomy status
astronomy sergey » astronomy survey, astronomy surveys, astronomy seven
moore nautical » board nautical, mile nautical, some nautical
moore national » moors national, more national, before national

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