Perhaps you should try some spelling variations:
"yale agrarian studies." » "yale migration studies.", "yale asian studies.", "yale american studies.", "male agrarian studies.", "sale agrarian studies."
"enabling rural studies." » "enabling legal studies.", "enabling urban studies.", "enabling rural students.", "enabling israel studies."
"enable urban studies." » "viable urban studies.", "enabling urban studies.", "enhance urban studies."

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: (("yale agrarian studies.") OR ((("enable urban studies.") OR ("enabling rural studies."))))~.
• Removing quotes may allow a broader search: (( yale agrarian studies. ) or ((( enable urban studies. ) or ( enabling rural studies. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("yale agrarian studies.") or ((("enable urban studies.") or ("enabling rural studies."))))*.