Perhaps you should try some spelling variations:
"maternal nutrition" » "material nutrition", "materials nutrition", "materia nutrition", "maternal nutricion", "materiall nutrition"
"maternal nutritivo" » "material nutritivo", "materials nutritivo", "materia nutritivo", "materiall nutritivo"
"maternal nutritiva" » "material nutritiva", "materials nutritiva", "materia nutritiva", "materiall nutritiva"
"materna nutrition" » "materna nutricion", "materia nutrition", "material nutrition"
"materiall nutritivo" » "material nutritivo", "materials nutritivo", "materiales 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 (\"materna nutrition\"))) OR (((\"maternal nutritivo\") OR (\"materiall nutritivo\"))))) OR (\"maternal nutritiva\"))~".
• Removing quotes may allow a broader search: (((((( maternal nutrition ) OR ( materna nutrition ))) OR ((( maternal nutritivo ) OR ( materiall nutritivo ))))) OR ( maternal nutritiva ))~.
• Adding a wildcard symbol may retrieve word variants: (((((("maternal nutrition") OR ("materna nutrition"))) OR ((("maternal nutritivo") OR ("materiall nutritivo"))))) OR ("maternal nutritiva"))*.