Perhaps you should try some spelling variations:
astronomy survives » astronomy surveys, astronomy studies
astronomy survey » astronomy surveys, astronomy sergey, autonomy survey
moocs practical » books practical, mics practical, colts practical
patrick moocs » patrick moore, patrick mons, patrick moyes

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "the patrick moocs practical ((astronomy survives) OR (astronomy survey))".
• Adding a wildcard symbol may retrieve word variants: the patrick moocs practical ((astronomy survives) OR (astronomy survey))*.