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