Perhaps you should try some spelling variations:
instancias » instancia (Expand Search)
academicas.\" » academica.\" (Expand Search), academico.\" (Expand Search), academicoas.\" (Expand Search), academicaas.\" (Expand Search)
academic.\" » academico.\" (Expand Search), academica.\" (Expand Search)
academicos.\" » academicoos.\" (Expand Search), academicaos.\" (Expand Search)
academia.\" » academica.\" (Expand Search), academico.\" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "\"\\"(sustancias OR instancias) (((academicas.\\" OR academic.\\") OR academia.\\") OR academicos.\\")~\"".
• Removing quotes may allow a broader search: (sustancias OR instancias) (((academicas. OR academic. ) OR academia. ) OR academicos. )~.