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 materializa" » "historicos materializa", "historias materializa", "historia materializa", "historicas materializan", "historicas materializado", "historicas materializada"
"historica materializar" » "historica materializanr", "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 materialism") 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 materialism") OR ("historica materializar")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"historical materialism\") or (((((\"historicas materialism\") OR (\"historicas materializa\"))) or (((\"historica materialism\") or (\"historica materializar\"))))))".
• Removing quotes may allow a broader search: (( historical materialism ) or ((((( historicas materialism ) OR ( historicas materializa ))) or ((( historica materialism ) or ( historica materializar )))))).
• Adding a wildcard symbol may retrieve word variants: (("historical materialism") or ((((("historicas materialism") OR ("historicas materializa"))) or ((("historica materialism") or ("historica materializar"))))))*.