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

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