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 neurologico nacional", "instituto agroecologico nacional", "instituto geologico nacional", "instituto economica nacional", "instituto tecnologico nacionales"
"instituto pedagogico nacional" » "instituto pedagogica nacional", "instituto pedagogico tradicional", "instituto pedagogicos tradicional"
"instituto economico nacional" » "instituto tecnologico nacional", "instituto tecnico nacional", "estimulo economico nacional", "instituto economia nacional", "instituto economico regional", "instituto economico internacional"
"instituto colegio nacional" » "instituto copesal nacional", "antiguo colegio nacional", "instituto clinico nacional", "instituto coleccion nacional"
"instituto oncologico nacional" » "instituto oncologia nacional", "instituto deontologico nacional"

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