Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy, positional astronomy
astronomy surveying » astronomy during
astronomy surveys » astronomy survey, astronomy survives, astronomy sergey
moyes practical » modes practical, movies practical, moraes practical
patrick moyes » patrick keyes, patrick mayen, patrick mons
del practical » dll practical, model practical, daml practical
patrick del » patrick de, patrick dobel, patrick dale

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 moyes practical astronomy surveying ) OR ( the patrick del practical astronomy surveys )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick moyes practical astronomy surveying ) or ( the patrick del practical astronomy surveys ))*.