Perhaps you should try some spelling variations:
astronomy sergey » astronomy survey, astronomy surveys, astronomy large
astronomy seven » astronomy some, astronomy science, astronomy between
moore optical » moire optical, core optical, moon optical
patrick more » patrick moyes, patrick mkie, patrick mark
more optical » moire optical, core optical, more optimal
patrick some » patrick home, patrick sole, trick some
some optical » some optimal, some poetical, some political

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