Perhaps you should try some spelling variations:
"instituto economico nacional" » "instituto tecnologico nacional", "estimulo economico nacional", "instituto academico nacional", "instituto economia nacional", "instituto economico regional", "instituto astronomico nacional"
"instituto pedagogico nacional" » "instituto pedagogica nacional", "instituto pedagogico tradicional", "instituto pedagogicos tradicional"
"instituto tecnico nacional" » "instituto unico nacional", "instituto tecnico internacional", "instituto banco nacional"
"instituto oncologico nacional" » "instituto ecologico 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 economico nacional") OR ("instituto tecnico nacional"))) or ("instituto oncologico nacional"))) or ("instituto pedagogico nacional"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("instituto economico nacional") OR ("instituto tecnico nacional"))) OR ("instituto oncologico nacional"))) OR ("instituto pedagogico nacional")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"instituto economico nacional\") OR (\"instituto tecnico nacional\"))) or (\"instituto oncologico nacional\"))) or (\"instituto pedagogico nacional\"))".
• Removing quotes may allow a broader search: (((((( instituto economico nacional ) OR ( instituto tecnico nacional ))) or ( instituto oncologico nacional ))) or ( instituto pedagogico nacional )).
• Adding a wildcard symbol may retrieve word variants: (((((("instituto economico nacional") OR ("instituto tecnico nacional"))) or ("instituto oncologico nacional"))) or ("instituto pedagogico nacional"))*.