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