Perhaps you should try some spelling variations:
practical astronomy » optical astronomy, positional astronomy
astronomy sergey » astronomy survey, astronomy surveys, astronomy seven
mons practical » coins practical, bonds practical, boss practical
some nautical » some analytical, some practical, some critical
patrick mons » patrick moyes, patrick bond, patrick mpondo
patrick logs » patrick l.s, patrick love, patrick legros
patrick lord » patrick bond, patrick ll.d, patrick gordon
patrick some » patrick home, patrick sole, trick some

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 mons practical astronomy sergey ) OR ((( the ((patrick logs) OR (patrick lord)) nautical astronomy sergey ) OR ( the patrick some nautical astronomy sergey )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( the patrick mons practical astronomy sergey ) or ((( the ((patrick logs) OR (patrick lord)) nautical astronomy sergey ) or ( the patrick some nautical astronomy sergey ))))".
• Adding a wildcard symbol may retrieve word variants: (( the patrick mons practical astronomy sergey ) or ((( the ((patrick logs) OR (patrick lord)) nautical astronomy sergey ) or ( the patrick some nautical astronomy sergey ))))*.