Perhaps you should try some spelling variations:
astronomy surveying » astronomy during
practical astronomy » nautical astronomy, optical astronomy
astronomy sergey » astronomy survey, astronomy surveys, astronomy seven
aware positional » aware position, swarm positional, aware conditional
moore practical » more practical, moocs practical, mouse practical
patrick aware » patrick edward, patrick andrew, patrick bajari

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 practical astronomy sergey ) OR ( the patrick aware positional astronomy surveying )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick moore practical astronomy sergey ) or ( the patrick aware positional astronomy surveying ))*.