Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
notes practical » notes critical
abcs practical » apis practical, ics practical, mics practical
aris practical » basis practical, his practical, various practical
patrick notes » patrick dobel, patrick naef, patrick nolan
patrick abcs » patrick bas, patrick arens, patrick darcy
patrick aris » patrick april, patrick arens, patrick barwise

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