Perhaps you should try some spelling variations:
"instituto tecnologico nacional" » "instituto tecnico nacional", "instituto pedagogico nacional", "instituto tecnologico nacionales", "instituto tecnologico relacionado"
"instituto astronomico nacional" » "institucional gastronomico nacional", "instituto neurologico nacional", "instituto antonio nacional"
"instituto geologico nacional" » "instituto neurologico nacional", "instituto agroecologico nacional", "instituto pedagogico nacional", "instituto geologico regional", "instituto economico nacional"
"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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("instituto tecnologico nacional") OR ("instituto astronomico nacional"))) OR ((("instituto geologico nacional") OR ("instituto oncologico nacional"))))~.
• Removing quotes may allow a broader search: (((( instituto tecnologico nacional ) or ( instituto astronomico nacional ))) or ((( instituto geologico nacional ) or ( instituto oncologico nacional ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("instituto tecnologico nacional") or ("instituto astronomico nacional"))) or ((("instituto geologico nacional") or ("instituto oncologico nacional"))))*.