Perhaps you should try some spelling variations:
"sunk series in african urban studies." » "sunk series in africa urban studies.", "sunk series in africas urban studies.", "sunk series in africa's urban studies.", "suny series in african urban studies.", "bank series in african urban studies."
"sunk series in african rural studies." » "sunk series in african rural students.", "sunk series in african israel studies.", "sunk series in african legal studies.", "suny series in african rural studies.", "bank series in african rural studies."

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"sunk series in african urban studies.\") OR (\"sunk series in african rural studies.\"))~".
• Removing quotes may allow a broader search: (( sunk series in african urban studies. ) OR ( sunk series in african rural studies. ))~.
• Adding a wildcard symbol may retrieve word variants: (("sunk series in african urban studies.") OR ("sunk series in african rural studies."))*.