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"
"historicas materializa" » "historicos materializa", "historia materializa", "historicas materializar", "historicas materializan", "historicas materializado", "historias materializa"

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