Perhaps you should try some spelling variations:
investigaciones de » investigacion de (Expand Search), investigaciones en (Expand Search), investigacion del (Expand Search)
investigaciones e » investigaciones en (Expand Search), investigaciones y (Expand Search), investigaciones del (Expand Search)
informes del » informe del (Expand Search), informes de (Expand Search), informe de (Expand Search)
general del » general de (Expand Search)
del trabajo » de trabajo (Expand Search)

Try widening your search to All Fields.

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

• Removing quotes may allow a broader search: ((investigaciones e) OR (investigaciones de)) informes del consejo general del trabajo social ;.