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