Perhaps you should try some spelling variations:
practical astronomy » optical astronomy, positional astronomy
astronomy surveying » astronomy during
astronomy survives » astronomy survey, astronomy surveys, astronomy studies
results practical » colts practical, results optical
patrick results » matrices results, matrix results, patrick rules
d nautical » _ nautical, a nautical, 2 nautical
patrick d » patrick _, patrick a

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 results practical astronomy survives ) OR ( the patrick d nautical astronomy surveying )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick results practical astronomy survives ) or ( the patrick d nautical astronomy surveying ))*.