Perhaps you should try some spelling variations:
economicos internacionales » economicas internacionales, economia internacional
relaciones internacional » relaciones internacionales, regulaciones internacionales, regulacion internacional
mexico relaciones » mexico religion, mexico publicaciones
mexico economicos » mexico economic, tecnico economicos, exito economico

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( mexico relaciones internacional. ) or ( mexico economicos internacionales. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( mexico relaciones internacional. ) OR ( mexico economicos internacionales. )).
• Adding a wildcard symbol may retrieve word variants: (( mexico relaciones internacional. ) or ( mexico economicos internacionales. ))*.