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

You may be able to get more results by adjusting your search query.

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