Perhaps you should try some spelling variations:
"instituto astronomico nacional" » "institucional gastronomico nacional", "instituto neurologico nacional", "instituto antonio nacional"
"instituto pedagogico nacional" » "instituto tecnologico nacional", "instituto oncologico nacional", "instituto pedagogica nacional", "instituto pedagogico tradicional", "instituto pedagogico social"
"instituto economico nacional" » "instituto tecnologico nacional", "instituto oncologico nacional", "instituto tecnico nacional", "instituto economia nacional", "instituto economico regional", "instituto economico internacional"
"instituto geologico nacional" » "instituto tecnologico nacional", "instituto neurologico nacional", "instituto oncologico nacional", "instituto geologico regional", "instituto geologica regional"

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