Perhaps you should try some spelling variations:
"challenges facing _ physical development." » "challenges facing _ social development.", "challenges facing _ local development.", "challenges facing _ capital development."
"challenges facing can policy development." » "challenges facing bank policy development.", "challenges facing a policy development.", "challenges facing war policy development.", "challenges facing ocean policy development.", "challenges facing plan policy development.", "challenges facing main policy development."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("challenges facing _ physical development.") or ("challenges facing can policy development."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("challenges facing _ physical development.") OR ("challenges facing can policy development."))*.
• Removing quotes may allow a broader search: (( challenges facing _ physical development. ) or ( challenges facing can policy development. ))*.