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