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

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