Perhaps you should try some spelling variations:
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
moore positional » pure positional, whole positional, case positional
aware positional » aware position, swarm positional, aware conditional
astronomy sergey » astronomy survey, astronomy seven, astronomy large

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