Perhaps you should try some spelling variations:
"middle last culture" » "middle past culture", "middle plant culture", "middle yeast culture", "middle east culture", "middle class culture", "middle late culture"
"middle part culture" » "middle apart culture", "middle art culture", "middle past culture", "middle earth culture", "middle path culture", "middle phase culture"
"middle root culture" » "middle root cultures", "middle fruit culture", "middle rio culture", "middle row culture", "middle road culture"

Try widening your search to All Fields.

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 last culture") OR ((("middle part culture") OR ("middle root culture")))).
• Removing quotes may allow a broader search: (( middle last culture ) or ((( middle part culture ) or ( middle root culture )))).
• Adding a wildcard symbol may retrieve word variants: (("middle last culture") or ((("middle part culture") or ("middle root culture"))))*.