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