Perhaps you should try some spelling variations:
practical astronomy » optical astronomy, positional astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy survives
bond practical » bonds practical, bono practical, beyond practical
board nautical » board practical, board national, board neutral
patrick board » patrick hubbard, patrick leonard, patrick girard
patrick bond » patrick d, patrick b, patrick d.d

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 bond practical astronomy series ) OR ( the patrick board nautical astronomy series )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick bond practical astronomy series ) or ( the patrick board nautical astronomy series ))*.