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