Perhaps you should try some spelling variations:
astronomy survives » astronomy survey, astronomy surveys, astronomy studies
moocs practical » books practical, colts practical, coins practical
mics practical » micro practical, abcs practical, metrics practical
ics practical » abcs practical, ethics practical, basics 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) OR (ics practical)))) astronomy survives.
• The words AND, OR and NOT may confuse the search; try adding quotes: "the patrick ((moocs practical) or (((mics practical) OR (ics practical)))) astronomy survives".
• Adding a wildcard symbol may retrieve word variants: the patrick ((moocs practical) or (((mics practical) OR (ics practical)))) astronomy survives*.