Perhaps you should try some spelling variations:
"middle class culture" » "middle mass culture", "middle cross culture", "middle cells culture", "middle east culture"
"middle part culture" » "middle apart culture", "middle art culture", "middle past culture", "middle earth culture", "middle path culture", "middle phase culture"

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: (("middle class culture") OR ("middle part culture"))*.
• Removing quotes may allow a broader search: (( middle class culture ) or ( middle part culture ))*.