Perhaps you should try some spelling variations:
der transport » de transport, den transport, door transport
head transfer » heat transfer, heart transfer, load transfer
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
de head » her head, per head, red 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 ((firms a) OR (firms _)) ) OR ( guias de head transfer 3 a ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( areas act der transport ((firms a) OR (firms _)) ) or ( guias de head transfer 3 a ))~".
• Adding a wildcard symbol may retrieve word variants: (( areas act der transport ((firms a) OR (firms _)) ) or ( guias de head transfer 3 a ))*.