Perhaps you should try some spelling variations:
"instituto tecnologico nacional" » "instituto tecnico nacional", "instituto pedagogico nacional", "instituto tecnologico nacionales", "instituto tecnologico relacionado"
"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 oncologico nacional") OR ((("instituto geologico nacional") OR ("instituto tecnologico nacional"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"instituto oncologico nacional\") or (((\"instituto geologico nacional\") OR (\"instituto tecnologico nacional\"))))~".
• Removing quotes may allow a broader search: (( instituto oncologico nacional ) or ((( instituto geologico nacional ) OR ( instituto tecnologico nacional ))))~.
• Adding a wildcard symbol may retrieve word variants: (("instituto oncologico nacional") or ((("instituto geologico nacional") OR ("instituto tecnologico nacional"))))*.