Perhaps you should try some spelling variations:
"external nutrition" » "external nutritivo"
"internal nutrition" » "internal nutritivo", "integral nutrition", "internet nutrition"
"maternal nutricion" » "materna nutricion"
"materials nutritiva" » "materiales nutritiva"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("external nutrition") OR ("internal nutrition"))) OR ((("maternal nutricion") OR ((("materia nutricion") OR ("material nutricion"))))))) OR ("materials nutritiva"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"external nutrition\") OR (\"internal nutrition\"))) OR (((\"maternal nutricion\") OR (((\"materia nutricion\") OR (\"material nutricion\"))))))) OR (\"materials nutritiva\"))".
• Removing quotes may allow a broader search: (((((( external nutrition ) OR ( internal nutrition ))) OR ((( maternal nutricion ) OR ((( materia nutricion ) OR ( material nutricion ))))))) OR ( materials nutritiva )).
• Adding a wildcard symbol may retrieve word variants: (((((("external nutrition") OR ("internal nutrition"))) OR ((("maternal nutricion") OR ((("materia nutricion") OR ("material nutricion"))))))) OR ("materials nutritiva"))*.