Perhaps you should try some spelling variations:
"middle explant culture" » "middle explant cultures", "middle england culture", "riddle explain culture"
"middle plane culture" » "middle plant culture", "middle place culture", "middle plan culture", "middle lane culture", "middle plate 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 plane culture") OR ("middle explant culture")).
• Removing quotes may allow a broader search: (( middle plane culture ) or ( middle explant culture )).
• Adding a wildcard symbol may retrieve word variants: (("middle plane culture") or ("middle explant culture"))*.