Perhaps you should try some spelling variations:
astronomy survives » astronomy survey, astronomy surveys, astronomy studies
astronomy sergey » astronomy survey, astronomy surveys, astronomy seven
case practical » cases practical, care practical, base practical
patrick case » patrick fraser, patrick a, patrick c

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 case practical ((astronomy survives) OR (astronomy sergey)).
• Adding a wildcard symbol may retrieve word variants: the patrick case practical ((astronomy survives) or (astronomy sergey))*.