Perhaps you should try some spelling variations:
romer transport » river transport, lower transport, power transport
transfer sur » transfer der, transfer auf, transfer aus
der romer » der 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 romer transport _ base ) OR ( luis c heat transfer sur a ))~.
• Adding a wildcard symbol may retrieve word variants: (( luis der romer transport _ base ) or ( luis c heat transfer sur a ))*.