Perhaps you should try some spelling variations:
"medieval language development authority" » "medical language development authority", "retrieval language development authority", "media language development authority"
"federal language development authority" » "general language development authority", "several language development authority", "medical language development authority"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("federal language development authority") OR ("medieval language development authority"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"federal language development authority\") OR (\"medieval language development authority\"))".
• Removing quotes may allow a broader search: (( federal language development authority ) OR ( medieval language development authority )).
• Adding a wildcard symbol may retrieve word variants: (("federal language development authority") OR ("medieval language development authority"))*.