Perhaps you should try some spelling variations:
roman transport » romania transport, road transport, human transport
transfer sur » transfer der, transfer auf, transfer aus
der roman » der romane, der romer, du roman
luis der » luis de, luis e, louis de
luis c » luis f
c heat » c1 heat, _ heat, a heat
sur a » sur la, sgr a, sul a

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 der roman transport _ base ) OR ( luis c heat transfer sur a ))~.
• Adding a wildcard symbol may retrieve word variants: (( luis der roman transport _ base ) or ( luis c heat transfer sur a ))*.