Perhaps you should try some spelling variations:
"maternal nutrition" » "material nutrition", "materna nutrition", "internal nutrition"
"maternal nutritivo" » "material nutritivo", "materna nutritivo", "internal nutritivo"
"maternal nutricion" » "material nutricion", "materna nutricion", "internal nutricion"
"materials nutricion" » "materiales nutricion", "material nutricion"

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