Perhaps you should try some spelling variations:
"historical materialism" » "historia materialism", "historico materialism", "historicos materialism", "historical materiales", "historial materialism"
"historicas materialism" » "historicas materiales", "historicos materialism", "historias materialism", "historia materialism"
"historicas materializa" » "historicos materializa", "historias materializa", "historia materializa", "historicas materializado", "historicas materializada"
"historica materializan" » "historica materializadon", "historica materializadan", "historia materializan", "historica materializado", "historica materializada", "historica materializacion"
"historica materializadon" » "historica materializadodon", "historica materializadadon", "historia materializadon", "historica materializado", "historica materializacion", "historica materializada"
"historica materializar" » "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 materializan") OR ("historica materializadon"))) 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 materializan") OR ("historica materializadon"))) 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 materializan\") OR (\"historica materializadon\"))) or (\"historica materializar\"))))))".
• Removing quotes may allow a broader search: (( historical materialism ) or ((((( historicas materialism ) or ( historicas materializa ))) or ((((( historica materializan ) OR ( historica materializadon ))) or ( historica materializar )))))).
• Adding a wildcard symbol may retrieve word variants: (("historical materialism") or ((((("historicas materialism") or ("historicas materializa"))) or ((((("historica materializan") OR ("historica materializadon"))) or ("historica materializar"))))))*.