Perhaps you should try some spelling variations:
"its organizations failed" » "its organizations based", "its organizations fad", "its organization failures", "its organization failed", "rights organizations failed", "roots organizations failed"
"rwanda urbanization issues" » "rapid urbanization issues", "china urbanization issues", "rwanda organization issues", "rwanda organizations issues", "rwanda organizational issues"
"_ federation history" » "_ migration history", "_ federalism history", "_ federated history"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("rwanda urbanization issues") or ("its organizations failed"))) or ("_ federation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("rwanda urbanization issues") OR ("its organizations failed"))) OR ("_ federation history")).
• Removing quotes may allow a broader search: (((( rwanda urbanization issues ) or ( its organizations failed ))) or ( _ federation history )).
• Adding a wildcard symbol may retrieve word variants: (((("rwanda urbanization issues") or ("its organizations failed"))) or ("_ federation history"))*.