Perhaps you should try some spelling variations:
"luxembourg cote study" » "luxembourg city study", "luxembourg context study", "luxembourg income study", "luxembourg core study", "luxembourg code study", "luxembourg note study"
"luxembourg jose study" » "luxembourg josee study", "luxembourg june study", "luxembourg phase study", "luxembourg dose study", "luxembourg close study", "luxembourg mouse 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 cote study\") OR (\"luxembourg jose study\"))".
• Removing quotes may allow a broader search: (( luxembourg cote study ) OR ( luxembourg jose study )).
• Adding a wildcard symbol may retrieve word variants: (("luxembourg cote study") OR ("luxembourg jose study"))*.