Perhaps you should try some spelling variations:
"instituto economia nacional" » "instituto colombiano nacional", "sustitucion economia nacional", "instituto economia regional", "instituto economica regional", "instituto economia internacional"
"instituto teoria relacionar" » "instituto teorias relacionadas", "instituto para relacionar", "instituto teoria ecuacional", "instituto torca relacionar", "instituto tebaida relacionar", "instituto mora relacionar"
"instituto teoria relacional" » "instituto torca relacional", "instituto tebaida relacional", "instituto mora relacional"
"instituto oncol nacional" » "instituto con nacional", "instituto oncologico nacional", "instituto manjon nacional", "instituto banco nacional", "instituto local nacional"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("instituto economia nacional") or ("instituto oncol nacional"))) or ((("instituto teoria relacional") or ("instituto teoria relacionar"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("instituto economia nacional") OR ("instituto oncol nacional"))) OR ((("instituto teoria relacional") OR ("instituto teoria relacionar")))).
• Removing quotes may allow a broader search: (((( instituto economia nacional ) or ( instituto oncol nacional ))) or ((( instituto teoria relacional ) or ( instituto teoria relacionar )))).
• Adding a wildcard symbol may retrieve word variants: (((("instituto economia nacional") or ("instituto oncol nacional"))) or ((("instituto teoria relacional") or ("instituto teoria relacionar"))))*.