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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("instituto oncologico 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 oncologico nacional") OR ((("instituto economico nacional") OR ("instituto astronomico nacional"))))) OR ("instituto neurologico nacional")).
• Removing quotes may allow a broader search: (((( instituto oncologico nacional ) or ((( instituto economico nacional ) or ( instituto astronomico nacional ))))) or ( instituto neurologico nacional )).
• Adding a wildcard symbol may retrieve word variants: (((("instituto oncologico nacional") or ((("instituto economico nacional") or ("instituto astronomico nacional"))))) or ("instituto neurologico nacional"))*.