Perhaps you should try some spelling variations:
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
moocs nautical » moocs practical
logs nautical » some nautical
hoc nautical » hoc analytical, some nautical, _ nautical
nos nautical » some nautical, task nautical, _ nautical

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) OR (((((hoc nautical) OR (logs nautical))) OR (nos nautical)))) astronomy surveys*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "the patrick ((moocs nautical) or (((((hoc nautical) OR (logs nautical))) or (nos nautical)))) astronomy surveys*".