Perhaps you should try some spelling variations:
instituto tecnologias » instituto tecnologico, instituto geologico
publicaciones y » publicaciones de, publicaciones del, publicacions de
tecnologias de » tecnologia de
minerales de » generales de, minerales en, mineral de
y instituto » el instituto, e institutos, al instituto
mineral y » general y

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: publicaciones y instituto tecnologias de ((mineral y) OR (minerales de)) espana ;~.
• Adding a wildcard symbol may retrieve word variants: publicaciones y instituto tecnologias de ((mineral y) or (minerales de)) espana ;*.