Perhaps you should try some spelling variations:
"instituto tecnologico nacional" » "instituto oncologico nacional", "instituto tecnico nacional", "instituto tecnologico nacionales"
"instituto pedagogico nacional" » "instituto oncologico nacional", "instituto pedagogica nacional", "instituto pedagogico tradicional", "instituto pedagogico social"
"instituto ecologico nacional" » "instituto oncologico nacional", "instituto neurologico nacional", "instituto agroecologico nacional", "instituto economico nacional", "instituto colegio nacional"
"instituto geologico nacional" » "instituto neurologico nacional", "instituto oncologico nacional", "instituto agroecologico nacional", "instituto geologico regional", "instituto economico nacional"

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

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