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