Perhaps you should try some spelling variations:
astronomy survey » astronomy surveys, astronomy sergey, autonomy survey
moore practical » moocs practical, mouse practical, course practical
more practical » some 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 ((moore practical) OR (more practical)) astronomy survey.
• Adding a wildcard symbol may retrieve word variants: the patrick ((moore practical) or (more practical)) astronomy survey*.