Perhaps you should try some spelling variations:
"instituto tecnologico nacional" » "instituto tecnico nacional", "instituto tecnologico nacionales", "instituto geologico nacional"
"instituto pedagogico social" » "instituto pedagogia social"
"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 pedagogico social") or ("instituto oncologico nacional"))) or ("instituto tecnologico nacional"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("instituto pedagogico social") OR ("instituto oncologico nacional"))) OR ("instituto tecnologico nacional")).
• Removing quotes may allow a broader search: (((( instituto pedagogico social ) or ( instituto oncologico nacional ))) or ( instituto tecnologico nacional )).
• Adding a wildcard symbol may retrieve word variants: (((("instituto pedagogico social") or ("instituto oncologico nacional"))) or ("instituto tecnologico nacional"))*.