Perhaps you should try some spelling variations:
"culture naturalism" » "cultural naturalism", "cultural naturalist", "culture natural"
"culture dualism" » "culture quality"
"nature dualism" » "nature quality"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("culture dualism") OR ("nature dualism"))) OR ("culture naturalism")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"culture dualism\") OR (\"nature dualism\"))) or (\"culture naturalism\"))".
• Removing quotes may allow a broader search: (((( culture dualism ) OR ( nature dualism ))) or ( culture naturalism )).
• Adding a wildcard symbol may retrieve word variants: (((("culture dualism") OR ("nature dualism"))) or ("culture naturalism"))*.