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