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.

• Performing a fuzzy search may retrieve terms with similar spellings: "(sustancias OR instancias) (((academicas." OR academic.") OR academica.") OR academico.")~.
• 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. )*.