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

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"maternal nutrition\") OR (((((\"materia nutritivo\") OR (\"material nutritivo\"))) OR (\"materna nutritivo\"))))~".
• Removing quotes may allow a broader search: (( maternal nutrition ) OR ((((( materia nutritivo ) OR ( material nutritivo ))) OR ( materna nutritivo ))))~.
• Adding a wildcard symbol may retrieve word variants: (("maternal nutrition") OR ((((("materia nutritivo") OR ("material nutritivo"))) OR ("materna nutritivo"))))*.