Perhaps you should try some spelling variations:
"historical materialism" » "historia materialism", "historico materialism", "historicos materialism", "historical materiales", "historical materializa", "historical materializan", "historial materialism"
"historicas materialism" » "historicas materiales", "historicas materializa", "historicas materializan", "historicos materialism", "historias materialism", "historia materialism"
"historica materialism" » "historica materiales", "historica materializa", "historica materializan", "historia materialism"
"historica materializar" » "historia materializar"
"historica materializado" » "historia materializado", "historica materializacion"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("historical materialism") or ((("historicas materialism") or ((((("historica materialism") OR ("historica materializar"))) or ("historica materializado"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("historical materialism") OR ((("historicas materialism") OR ((((("historica materialism") OR ("historica materializar"))) OR ("historica materializado")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"historical materialism\") or (((\"historicas materialism\") or (((((\"historica materialism\") OR (\"historica materializar\"))) or (\"historica materializado\"))))))".
• Removing quotes may allow a broader search: (( historical materialism ) or ((( historicas materialism ) or ((((( historica materialism ) OR ( historica materializar ))) or ( historica materializado )))))).
• Adding a wildcard symbol may retrieve word variants: (("historical materialism") or ((("historicas materialism") or ((((("historica materialism") OR ("historica materializar"))) or ("historica materializado"))))))*.