Perhaps you should try some spelling variations:
"historical materialism" » "historico materialism", "historicos materialism", "historias materialism", "historical materiales", "historical materializar", "historical materializan"
"historicas materialism" » "historicas materiales", "historicas materializar", "historicas materializan", "historicos materialism", "historias materialism", "historico materialism"
"historia materialism" » "historia materiales", "historia materializar", "historia materializan"
"historica materialism" » "historica materiales", "historica materializar", "historica materializan"
"historicas materializa" » "historicos materializa", "historias materializa", "historico materializa", "historicas materializar", "historicas materializan", "historicas materializado"
"historica materializadar" » "historica materializardar", "historica materializandar", "historica materializadodar", "historica materializada", "historica materializar", "historica 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 ("historia materialism"))) or ("historicas materializa"))) or ((("historica materialism") or ("historica materializadar"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("historical materialism") OR ((((((("historicas materialism") OR ("historia materialism"))) OR ("historicas materializa"))) OR ((("historica materialism") OR ("historica materializadar")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"historical materialism\") or (((((((\"historicas materialism\") OR (\"historia materialism\"))) or (\"historicas materializa\"))) or (((\"historica materialism\") or (\"historica materializadar\"))))))".
• Removing quotes may allow a broader search: (( historical materialism ) or ((((((( historicas materialism ) OR ( historia materialism ))) or ( historicas materializa ))) or ((( historica materialism ) or ( historica materializadar )))))).
• Adding a wildcard symbol may retrieve word variants: (("historical materialism") or ((((((("historicas materialism") OR ("historia materialism"))) or ("historicas materializa"))) or ((("historica materialism") or ("historica materializadar"))))))*.