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

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 nutrition\") OR (\"materia nutritiva\"))))) OR (((\"maternal nutritivo\") OR (\"materna nutritivo\"))))~".
• Removing quotes may allow a broader search: (((( maternal nutrition ) OR ((( materia nutrition ) OR ( materia nutritiva ))))) OR ((( maternal nutritivo ) OR ( materna nutritivo ))))~.
• Adding a wildcard symbol may retrieve word variants: (((("maternal nutrition") OR ((("materia nutrition") OR ("materia nutritiva"))))) OR ((("maternal nutritivo") OR ("materna nutritivo"))))*.