Perhaps you should try some spelling variations:
"instituto astronomico nacional" » "institucional gastronomico nacional", "instituto antonio nacional"
"instituto neurologico nacional" » "instituto tecnologico nacional", "instituto oncologico nacional", "instituto pedagogico nacional", "instituto geologico nacional", "instituto tecnologico nacionales"
"instituto ecologico nacional" » "instituto tecnologico nacional", "instituto oncologico nacional", "instituto agroecologico nacional", "instituto geologico nacional", "instituto colegio nacional"
"instituto economico nacional" » "instituto tecnologico nacional", "instituto oncologico nacional", "instituto tecnico nacional", "instituto economia nacional", "instituto economico regional", "instituto economico internacional"

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: (((("instituto ecologico nacional") or ((("instituto economico nacional") OR ("instituto astronomico nacional"))))) or ("instituto neurologico nacional"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("instituto ecologico nacional") OR ((("instituto economico nacional") OR ("instituto astronomico nacional"))))) OR ("instituto neurologico nacional")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"instituto ecologico nacional\") or (((\"instituto economico nacional\") OR (\"instituto astronomico nacional\"))))) or (\"instituto neurologico nacional\"))".
• Removing quotes may allow a broader search: (((( instituto ecologico nacional ) or ((( instituto economico nacional ) OR ( instituto astronomico nacional ))))) or ( instituto neurologico nacional )).
• Adding a wildcard symbol may retrieve word variants: (((("instituto ecologico nacional") or ((("instituto economico nacional") OR ("instituto astronomico nacional"))))) or ("instituto neurologico nacional"))*.