Perhaps you should try some spelling variations:
"africa regional hub development policies." » "africa regional hub development policy.", "africa regional hub development projects.", "africa region hub development policies.", "africa regional web development policies.", "africa regional job development policies.", "africa regional b development policies.", "africa regional _ development policies."
"africa regional drug development policies." » "africa regional drug development policy.", "africa regional drug development projects.", "africa region drug development policies.", "africa rational drug development policies.", "africa regional drought development policies.", "africa national drug development policies."

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: (("africa regional hub development policies.") OR ("africa regional drug development policies."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"africa regional hub development policies.\") OR (\"africa regional drug development policies.\"))".
• Removing quotes may allow a broader search: (( africa regional hub development policies. ) OR ( africa regional drug development policies. )).
• Adding a wildcard symbol may retrieve word variants: (("africa regional hub development policies.") OR ("africa regional drug development policies."))*.