Perhaps you should try some spelling variations:
"sale agrarian studies." » "sale asian studies.", "sale american studies.", "yale agrarian studies.", "small agrarian studies.", "states agrarian studies."
"safe migration studies." » "save migration studies.", "unsafe migration studies.", "scale migration studies."
"sale urban studies." » "safe urban studies.", "sample urban studies.", "shape urban studies."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("sale agrarian studies.") or ("safe migration studies."))) or ("sale urban studies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sale agrarian studies.") OR ("safe migration studies."))) OR ("sale urban studies."))*.
• Removing quotes may allow a broader search: (((( sale agrarian studies. ) or ( safe migration studies. ))) or ( sale urban studies. ))*.