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