Perhaps you should try some spelling variations:
"luxembourg outcome study" » "luxembourg october study", "luxembourg cote study", "luxembourg future study"
"luxembourg outcome studies" » "luxembourg october studies", "luxembourg cote studies", "luxembourg future studies"

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: (((("luxembourg outcome study") OR ("luxembourg outcome studies"))) OR ("luxembourg income study")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"luxembourg outcome study\") OR (\"luxembourg outcome studies\"))) or (\"luxembourg income study\"))".
• Removing quotes may allow a broader search: (((( luxembourg outcome study ) OR ( luxembourg outcome studies ))) or ( luxembourg income study )).
• Adding a wildcard symbol may retrieve word variants: (((("luxembourg outcome study") OR ("luxembourg outcome studies"))) or ("luxembourg income study"))*.