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

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

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