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