Perhaps you should try some spelling variations:
"Centre national de la recherche scientific" » "Centre nacional de la recherche scientific", "Centre national _ la recherche scientific", "Centre notacional de la recherche scientific"
"Centre racional de la recherche scientific" » "Centre racional del la recherche scientific", "Centre nacional de la recherche scientific", "Centre racional e la recherche scientific"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("Centre national de la recherche scientific") OR ("Centre racional de la recherche scientific"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Centre national de la recherche scientific\") OR (\"Centre racional de la recherche scientific\"))".
• Removing quotes may allow a broader search: (( Centre national de la recherche scientific ) OR ( Centre racional de la recherche scientific )).
• Adding a wildcard symbol may retrieve word variants: (("Centre national de la recherche scientific") OR ("Centre racional de la recherche scientific"))*.