Perhaps you should try some spelling variations:
astronomique internationale » economique internationale, assyriologique internationale, autonomie internationaler
international astronomical » international economics
international economic » international economics
union astronomique » union economique, icarien astronomique

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: ((((international astronomical) OR (international economic))) OR (observations astronomical)) union/union astronomique internationale*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((international astronomical) OR (international economic))) or (observations astronomical)) union/union astronomique internationale*".