Perhaps you should try some spelling variations:
authenticity relation » authenticity protection, authentic interpretation, authenticity aspirations
qur'an authenticity » german authenticity, rural authenticity, brand authenticity
external relations » internal regulations, external positions
model external » model internal, total external, does external

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( qur'an authenticity relation. ) or ( model external relations. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( qur'an authenticity relation. ) OR ( model external relations. )).
• Adding a wildcard symbol may retrieve word variants: (( qur'an authenticity relation. ) or ( model external relations. ))*.