Perhaps you should try some spelling variations:
"maternal nutrition" » "materials nutrition", "materia nutrition", "internal nutrition", "maternal nutricion", "material nutrition"
"material nutrition" » "material nutricion", "materia nutrition"
"material nutritivo" » "materia nutritivo"
"materna 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 ((((("material nutrition") OR ("material nutritivo"))) OR ("materna nutritiva"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"maternal nutrition\") OR (((((\"material nutrition\") OR (\"material nutritivo\"))) OR (\"materna nutritiva\"))))".
• Removing quotes may allow a broader search: (( maternal nutrition ) OR ((((( material nutrition ) OR ( material nutritivo ))) OR ( materna nutritiva )))).
• Adding a wildcard symbol may retrieve word variants: (("maternal nutrition") OR ((((("material nutrition") OR ("material nutritivo"))) OR ("materna nutritiva"))))*.