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

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