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

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