Perhaps you should try some spelling variations:
burden across » borders across
et transport » en transport, eu transport, heat transport
transfer bei » transfer beim, transfers bei, transfer der
bias index » bios index
index et » index des, index der, index bei
bei mark » bei marx, bei marc, bei maria
luis e » luis f, luis a
luis c » luis f

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: (( bias index et transport burden across ) OR ( ((luis e) OR (luis c)) money transfer bei mark ))~.
• Adding a wildcard symbol may retrieve word variants: (( bias index et transport burden across ) or ( ((luis e) or (luis c)) money transfer bei mark ))*.