Perhaps you should try some spelling variations:
county observatory » coude observatory, boundary observatory, acoustic observatory
youth observatory » bath observatory, coude observatory, southern observatory
court observatory » coude observatory, court observations, point observatory
eso astrophysics » from astrophysics, nasa astrophysics, dust astrophysics
core observatory » coude observatory, dome observatory, ebre observatory
european core » european corn, european corine, european case

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: (( eso astrophysics symposia, european ((youth observatory) OR (county observatory)) ) OR ((( eso astrophysics symposia, european court observatory ) OR ( eso astrophysics symposia, european core observatory )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( eso astrophysics symposia, european ((youth observatory) OR (county observatory)) ) or ((( eso astrophysics symposia, european court observatory ) or ( eso astrophysics symposia, european core observatory ))))".
• Adding a wildcard symbol may retrieve word variants: (( eso astrophysics symposia, european ((youth observatory) OR (county observatory)) ) or ((( eso astrophysics symposia, european court observatory ) or ( eso astrophysics symposia, european core observatory ))))*.