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