Perhaps you should try some spelling variations:
instancias » instancia (Expand Search)
academicas." » academica." (Expand Search), academico." (Expand Search), academia." (Expand Search), academicoas." (Expand Search), academicaas." (Expand Search), academiaas." (Expand Search)
academic." » academico." (Expand Search), academica." (Expand Search), academia." (Expand Search)
academicaao." » academicoaao." (Expand Search), academicaaao." (Expand Search), academiaaao." (Expand Search), academico." (Expand Search), academica." (Expand Search), academicals." (Expand Search)
academicos." » academicoos." (Expand Search), academicaos." (Expand Search), academiaos." (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) (((academicas." OR academic.") OR academicaao.") OR academicos.")~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"(sustancias OR instancias) (((academicas.\" OR academic.\") OR academicaao.\") OR academicos.\")".
• Removing quotes may allow a broader search: (sustancias OR instancias) (((academicas. OR academic. ) OR academicaao. ) OR academicos. ).
• Adding a wildcard symbol may retrieve word variants: "(sustancias OR instancias) (((academicas." OR academic.") OR academicaao.") OR academicos.")*.