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