Perhaps you should try some spelling variations:
instancias » instancia (Expand Search)
academiaas." » academicas." (Expand Search), academias." (Expand Search), academicals." (Expand Search)
academic." » academico." (Expand Search), academica." (Expand Search), academia." (Expand Search)
academicos." » academicoos." (Expand Search), academicaos." (Expand Search), academiaos." (Expand Search)
academiao." » academico." (Expand Search), academia." (Expand Search), academias." (Expand Search)

Try widening your search to All Fields.

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) (((academiaas." OR academic.") OR academiao.") OR academicos.")~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"(sustancias OR instancias) (((academiaas.\" OR academic.\") OR academiao.\") OR academicos.\")".
• Removing quotes may allow a broader search: (sustancias OR instancias) (((academiaas. OR academic. ) OR academiao. ) OR academicos. ).
• Adding a wildcard symbol may retrieve word variants: "(sustancias OR instancias) (((academiaas." OR academic.") OR academiao.") OR academicos.")*.