Perhaps you should try some spelling variations:
publicaciones seriadas » publicaciones periodicas
instituto pedagogica » instituciones pedagogicas, actitud pedagogica, instancia pedagogica
instituto pedagogico » instituto geologico, instrumento pedagogico, instituto tecnologico
mineral de » general de, mineria de, mineral y
y mineral » _ mineral, y minerales, de mineral

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

• Performing a fuzzy search may retrieve terms with similar spellings: publicaciones seriadas ((instituto pedagogica) OR (instituto pedagogico)) y mineral de espana ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "publicaciones seriadas ((instituto pedagogica) OR (instituto pedagogico)) y mineral de espana ;".
• Adding a wildcard symbol may retrieve word variants: publicaciones seriadas ((instituto pedagogica) OR (instituto pedagogico)) y mineral de espana ;*.