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