Perhaps you should try some spelling variations:
recherche economique » recherches agronomiques (Expand Search)
universita madrid » universita di (Expand Search)
laboratoires de » laboratorio de (Expand Search), laboratori de (Expand Search)
economique et » economiques de (Expand Search)
de recherche » de recherches (Expand Search), des recherches (Expand Search), la recherche (Expand Search)
r universita » _ university (Expand Search)
travaux de » travaux du (Expand Search)
travaux en » travaux des (Expand Search), travaux du (Expand Search), travaux p (Expand Search)
et r » et a (Expand Search)

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: ((travaux de) OR (travaux en)) laboratoires de recherche economique et r universita madrid~.
• Adding a wildcard symbol may retrieve word variants: ((travaux de) or (travaux en)) laboratoires de recherche economique et r universita madrid*.