Perhaps you should try some spelling variations:
"maternal nutrition" » "materna nutrition", "internal nutrition", "external nutrition", "maternal nutricion"
"maternal nutritiva" » "materna nutritiva", "internal nutritiva", "external nutritiva"
"material nutrition" » "material nutricion"
"materia nutrition" » "materia nutricion"
"materials nutritivo" » "materiales 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 (\"material nutrition\"))) OR (((\"materials nutritivo\") OR (\"materia nutrition\"))))) OR (\"maternal nutritiva\"))~".
• Removing quotes may allow a broader search: (((((( maternal nutrition ) OR ( material nutrition ))) OR ((( materials nutritivo ) OR ( materia nutrition ))))) OR ( maternal nutritiva ))~.
• Adding a wildcard symbol may retrieve word variants: (((((("maternal nutrition") OR ("material nutrition"))) OR ((("materials nutritivo") OR ("materia nutrition"))))) OR ("maternal nutritiva"))*.