Perhaps you should try some spelling variations:
"historical materialism" » "historica materialism" (Expand Search), "historicas materialism" (Expand Search), "historia materialism" (Expand Search), "historical materiales" (Expand Search)
"historico materialism" » "historico materiales" (Expand Search), "historia materialism" (Expand Search)
"historicos materialism" » "historicos materiales" (Expand Search), "historias materialism" (Expand Search), "historica materialism" (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"historical materialism\") OR (((\"historico materialism\") OR (\"historicos materialism\"))))~".
• Removing quotes may allow a broader search: (( historical materialism ) OR ((( historico materialism ) OR ( historicos materialism ))))~.
• Adding a wildcard symbol may retrieve word variants: (("historical materialism") OR ((("historico materialism") OR ("historicos materialism"))))*.