Perhaps you should try some spelling variations:
"historical materialism" » "historicas materialism", "historia materialism", "historical materiales", "historical materializa", "historical materializan", "historial materialism"
"historias materialism" » "historias materiales", "historias materializa", "historias materializan", "historia materialism"
"historico materialism" » "historico materiales", "historico materializa", "historico materializan", "historia materialism"
"historicos materialism" » "historicos materiales", "historicos materializa", "historicos materializan", "historias materialism"
"historica materializar" » "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 ("historias materialism"))) or ("historico materialism"))) or ((("historicos materialism") or ("historica materializar"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("historical materialism") OR ("historias materialism"))) OR ("historico materialism"))) OR ((("historicos materialism") OR ("historica materializar"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"historical materialism\") OR (\"historias materialism\"))) or (\"historico materialism\"))) or (((\"historicos materialism\") or (\"historica materializar\"))))*".
• Removing quotes may allow a broader search: (((((( historical materialism ) OR ( historias materialism ))) or ( historico materialism ))) or ((( historicos materialism ) or ( historica materializar ))))*.