Perhaps you should try some spelling variations:
der transport » de transport, den transport, door transport
transfer 3 » transfer _, transfer 4, transfer a
areas act » areas a, areas air, areas co
guias de » guia de, guide de, aguas de
act der » act does
fuels a » fuels _, fuel a
fuels 4 » fuels _
heat » head

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: (( areas act der transport ((fuels a) OR (fuels 4)) ) OR ( guias de heat transfer 3 a ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( areas act der transport ((fuels a) OR (fuels 4)) ) or ( guias de heat transfer 3 a ))~".
• Adding a wildcard symbol may retrieve word variants: (( areas act der transport ((fuels a) OR (fuels 4)) ) or ( guias de heat transfer 3 a ))*.