Perhaps you should try some spelling variations:
astronomy survives » astronomy survey, astronomy surveys, astronomy studies
moore practical » more practical, moocs practical, mouse practical
drops practical » aris practical, devops practices, arrays practical

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