Perhaps you should try some spelling variations:
leaders transformational » leader transformational, leadership transformational, measures transformational
transformational key » transformational _, transformational pt, transformational use
five transfer » file transfer, wire transfer, free transfer
transfer bei » transfer beim, transfers bei, transfer der
langues now » langues pour
12 leaders » 1 leaders, g20 leaders, _ leaders
das 12 » das 18, das 19, das 14
key a » key _, key 3, key 1

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( das 12 leaders transformational key a ) OR ( langues now five transfer bei _ ))~.
• Adding a wildcard symbol may retrieve word variants: (( das 12 leaders transformational key a ) or ( langues now five transfer bei _ ))*.