Perhaps you should try some spelling variations:
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
astronomy sergey » astronomy survey, astronomy seven, astronomy large
more positional » pure positional, monkey positional, aware positional
more practical » some practical
moore optical » moire optical, more optical, core optical
patrick more » patrick moyes, patrick mkie, patrick mark

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