Perhaps you should try some spelling variations:
astronomy surveys » astronomy survey, astronomy surveying, astronomy survives
blocks graphical » blocks radical, brown's graphical, objects graphical
blocks practical » clocks practical, books practical, rocks practical
astronomy sergey » astronomy survey, astronomy seven, astronomy large
lock graphical » click graphical, work graphical, c graphical

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 ((((blocks graphical) OR (blocks practical))) OR (lock graphical)) ((astronomy sergey) OR (astronomy surveys)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "the patrick ((((blocks graphical) OR (blocks practical))) or (lock graphical)) ((astronomy sergey) or (astronomy surveys))".
• Adding a wildcard symbol may retrieve word variants: the patrick ((((blocks graphical) OR (blocks practical))) or (lock graphical)) ((astronomy sergey) or (astronomy surveys))*.