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