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