Perhaps you should try some spelling variations:
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
moocs practical » books practical, colts practical, coins practical
mics practical » ics practical, micro practical, abcs 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 ((moocs practical) OR (mics practical)) astronomy surveys.
• Adding a wildcard symbol may retrieve word variants: the patrick ((moocs practical) or (mics practical)) astronomy surveys*.