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

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