Perhaps you should try some spelling variations:
"instituto astronomico nacional" » "institucional gastronomico nacional", "instituto neurologico nacional", "instituto antonio nacional"
"instituto ecologico nacional" » "instituto tecnologico nacional", "instituto oncologico nacional", "instituto neurologico 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"
"instituto geologico regional" » "instituto tecnologico regional", "instituto neurologico regional", "instituto oncologico regional", "instituto geologia regional", "instituto economico regional"

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 geologico regional"))))~.
• 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 geologico regional")))).
• 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 geologico regional\"))))".
• Removing quotes may allow a broader search: (( instituto ecologico nacional ) or ((((( instituto economico nacional ) OR ( instituto astronomico nacional ))) or ( instituto geologico regional )))).
• Adding a wildcard symbol may retrieve word variants: (("instituto ecologico nacional") or ((((("instituto economico nacional") OR ("instituto astronomico nacional"))) or ("instituto geologico regional"))))*.