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