Perhaps you should try some spelling variations:
astronomy survives » astronomy survey, astronomy studies
astronomy surveys » astronomy survey, astronomy surveying, astronomy sergey
corsi practical » cordis practical, mri practical, corrosion practical
patrick corsi » patrick cozzi, patrick coggi, patrick corr

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