Perhaps you should try some spelling variations:
astronomy survey » astronomy surveys, astronomy sergey, astronomy surveying
autonomy survey » autonomy surgery, astronomy surveys, taxonomy survey
moocs nautical » moocs practical, hoc nautical, logs nautical
patrick moocs » patrick moore, patrick mons, patrick moyes

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 nautical ((((astronomy survey) OR (autonomy survey))s) OR (((astronomy survey) OR (autonomy survey))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "the patrick moocs nautical ((((astronomy survey) OR (autonomy survey))s) or (((astronomy survey) OR (autonomy survey))))*".