Perhaps you should try some spelling variations:
moore positional » aware positional, whole positional, more positioning
astronomy sergey » astronomy surveys, astronomy seven, astronomy large
astronomy survey » astronomy surveys, autonomy survey, astronomy surveying
burke positional » like positional, barker's positional, surface positional
pure positional » aware positional, pure conditional, pure rotational
patrick burke » patrick burk, patrick blake, patrick burn
patrick pure » patrick part, patrick burk, patrick burn

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 astronomy sergey ) OR ((( the patrick pure positional astronomy survey ) OR ( the patrick burke positional astronomy survey ))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( the patrick moore positional astronomy sergey ) or ((( the patrick pure positional astronomy survey ) OR ( the patrick burke positional astronomy survey ))))*".