Perhaps you should try some spelling variations:
"instituto tecnologico nacional" » "instituto tecnico nacional", "instituto pedagogico nacional", "instituto tecnologico nacionales", "instituto geologico nacional"
"instituto neurologico nacional" » "instituto pedagogico nacional", "instituto geologico nacional", "instituto tecnologico nacionales", "instituto astronomico nacional"
"instituto colegio nacional" » "instituto copesal nacional", "antiguo colegio nacional", "instituto clinico nacional", "instituto coleccion nacional"
"instituto oncologico nacional" » "instituto ecologico nacional", "instituto oncologia nacional", "instituto deontologico nacional"

Try widening your search to All Fields.

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

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