Perhaps you should try some spelling variations:
"Yale agrarian studies." » "Yale american studies."
"yale migration studies." » "male migration studies.", "scale migration studies.", "safe migration studies."
"Yale asian studies." » "Yale urban studies."
yale asian » wave asian, called asian

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 ("Yale asian studies."))) OR ("yale migration studies."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Yale agrarian studies.\") OR (\"Yale asian studies.\"))) or (\"yale migration studies.\"))~".
• Removing quotes may allow a broader search: (((( Yale agrarian studies. ) OR ( Yale asian studies. ))) or ( yale migration studies. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("Yale agrarian studies.") OR ("Yale asian studies."))) or ("yale migration studies."))*.