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

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 ((("historica materializan") or ("historica materializar"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("historical materialism") OR ((((("historicas materialism") OR ("historicas materializa"))) OR ((("historica materializan") OR ("historica materializar")))))).
• Removing quotes may allow a broader search: (( historical materialism ) or ((((( historicas materialism ) or ( historicas materializa ))) or ((( historica materializan ) or ( historica materializar )))))).
• Adding a wildcard symbol may retrieve word variants: (("historical materialism") or ((((("historicas materialism") or ("historicas materializa"))) or ((("historica materializan") or ("historica materializar"))))))*.