Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, optical astronomy
astronomy survives » astronomy surveys, astronomy studies
model positional » model depositional, model position, model positions
astronomy survey » astronomy surveys, astronomy sergey, autonomy survey
moyes practical » modes practical, movies practical, moraes practical
patrick moyes » patrick keyes, patrick mayen, patrick mons
patrick model » patrick del, patrick bolder, patrick michel

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 survives ) OR ( the patrick model positional astronomy survey )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick moyes practical astronomy survives ) or ( the patrick model positional astronomy survey ))*.