Perhaps you should try some spelling variations:
"historical materialism" » "historicas materialism", "historico materialism", "historias materialism", "historical materiales", "historical materializa", "historical materializan"
"historicos materialism" » "historicos materiales", "historicos materializa", "historicos materializan", "historico materialism"
"historica materialism" » "historica materiales", "historica materializa", "historica materializan"
"historica materializado" » "historica materializacion"

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