Perhaps you should try some spelling variations:
instancias » instancia (Expand Search)
academicas.\" » academico.\" (Expand Search), academia.\" (Expand Search), academicoas.\" (Expand Search), academiaas.\" (Expand Search), academicos.\" (Expand Search)
academic.\" » academico.\" (Expand Search), academia.\" (Expand Search)
academica.\" » academicoa.\" (Expand Search), academiaa.\" (Expand Search), academico.\" (Expand Search)
academicos.\" » academicoos.\" (Expand Search), academiaos.\" (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 academica.\\") OR academicos.\\")\"".
• Removing quotes may allow a broader search: (sustancias OR instancias) (((academicas. OR academic. ) OR academica. ) OR academicos. ).