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