Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy
astronomy studies » astronomy study, economy studies, astronomy status
astronomy during » astronomy dialling, astronomy meeting, economy during
brown practical » brain practical, own practical, browser practical
mons positional » monkey positional, points positional, holds positional
patrick brown » patrick browne, patrick barron, patrick bond
patrick mons » patrick moyes, patrick bond, patrick mpondo

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 brown practical astronomy studies ) OR ( the patrick mons positional astronomy during )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick brown practical astronomy studies ) or ( the patrick mons positional astronomy during ))*.