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

You may be able to get more results by adjusting your search query.

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