Perhaps you should try some spelling variations:
studies transfer » students transfer, student transfer, student transfers
transfer file » transfer fee, transfer from, transfer fees
den transfer » gene transfer, heat transfer, data transfer
transfer wei » transfer bei, transfer beim, transfer west
file across » fire across, life across, time across
3.7 studies » 2.7 studies, 3.4 studies, 3 studies
wei carol » bei carl
ende den » ende der, ende des, wende der
luis 3.7 » louis 3.1, luis h.b
bis » bias

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: (( bis ende den transfer file across ) OR ( luis 3.7 studies transfer wei carol ))~.
• Adding a wildcard symbol may retrieve word variants: (( bis ende den transfer file across ) or ( luis 3.7 studies transfer wei carol ))*.