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

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 ("historico materialism"))) or ((("historicos materiales") or ("historica materialism"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("historical materialism") OR ("historico materialism"))) OR ((("historicos materiales") OR ("historica materialism"))))*.
• Removing quotes may allow a broader search: (((( historical materialism ) or ( historico materialism ))) or ((( historicos materiales ) or ( historica materialism ))))*.