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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("maternal nutrition") OR ("material nutrition"))) OR ((((("materna nutritiva") OR ("materna nutritivo"))) OR ((("material nutrition") OR ("material nutricion"))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"maternal nutrition\") OR (\"material nutrition\"))) OR (((((\"materna nutritiva\") OR (\"materna nutritivo\"))) OR (((\"material nutrition\") OR (\"material nutricion\"))))))".
• Removing quotes may allow a broader search: (((( maternal nutrition ) OR ( material nutrition ))) OR ((((( materna nutritiva ) OR ( materna nutritivo ))) OR ((( material nutrition ) OR ( material nutricion )))))).
• Adding a wildcard symbol may retrieve word variants: (((("maternal nutrition") OR ("material nutrition"))) OR ((((("materna nutritiva") OR ("materna nutritivo"))) OR ((("material nutrition") OR ("material nutricion"))))))*.