Perhaps you should try some spelling variations:
"realidad maternal de color" » "realidad interna de color", "mortalidad materna de color", "realidad laboral de color", "realidad material de color", "realidad material del color", "realidad materia de color"
"vida maria el dolor" » "vida diaria el dolor", "hilda maria el dolor", "alida maria el dolor", "vida maria e dolor", "vida maria en dolor", "vida maria a dolor", "vida maria el color"
"vida maria del dolor" » "vida diaria del dolor", "hilda maria del dolor", "alida maria del dolor", "vida maria del color"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("realidad maternal de color") or ((("vida maria el dolor") OR ("vida maria del dolor"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("realidad maternal de color") OR ((("vida maria el dolor") OR ("vida maria del dolor")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"realidad maternal de color\") or (((\"vida maria el dolor\") OR (\"vida maria del dolor\"))))".
• Removing quotes may allow a broader search: (( realidad maternal de color ) or ((( vida maria el dolor ) OR ( vida maria del dolor )))).
• Adding a wildcard symbol may retrieve word variants: (("realidad maternal de color") or ((("vida maria el dolor") OR ("vida maria del dolor"))))*.