Perhaps you should try some spelling variations:
astronomy surveying » astronomy during
astronomy survives » astronomy survey, astronomy surveys, astronomy studies
optical astronomy » spherical astronomy, positional astronomy
patrick mpondo » patricia opondo, patrick bond, patrick mons
patrick moraes » patrick moyes, patrick moore's, patrick moore
moraes optical » modes optical, cores optical, morais optimal

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 mpondo nautical astronomy survives ) OR ( the patrick moraes optical astronomy surveying )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick mpondo nautical astronomy survives ) or ( the patrick moraes optical astronomy surveying ))*.