Perhaps you should try some spelling variations:
transfer operations » transfer operators, transport operations, transit operations
transfer axiom » transfer from, transfer asia
head transfer » heat transfer, heart transfer, load transfer
des transfer » des transfers, den transfer, der transfer
luis a » luis f, luis c
luis e » luis f, luis c
e head » _ head, a head, her head
a des » a der, a das

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: (( luis a des transfer axiom martin ) OR ( luis e head transfer operations _ ))~.
• Adding a wildcard symbol may retrieve word variants: (( luis a des transfer axiom martin ) or ( luis e head transfer operations _ ))*.