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