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

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