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

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