Perhaps you should try some spelling variations:
de developpement » web developpement, agiles developpement
cahiers de » cahier de, cahier des, chantiers de
xavier de » bovier de
du centre » _ centre
a centre » _ centre, a central, a century

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: ((cahiers de) OR (xavier de)) politique economique ((((du centre) OR (a centre))) OR (_ central)) de developpement de l'ocde.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((cahiers de) or (xavier de)) politique economique ((((du centre) OR (a centre))) or (_ central)) de developpement de l'ocde".
• Adding a wildcard symbol may retrieve word variants: ((cahiers de) or (xavier de)) politique economique ((((du centre) OR (a centre))) or (_ central)) de developpement de l'ocde*.