Perhaps you should try some spelling variations:
transport signal » transform signal, transport design, transport annual
sea transport » road transport, bus transport
signal 4 » signal _, signal 3, signal 6
own sea » own ses, own seed, own real
d based » 3 based, bdd based, cfd based
3 basel » _ basel, 3 base, 3 based
aguas » agus, agua

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: (( aguas own sea transport signal 4 ) OR ( guias ((d based) OR (3 basel)) transfers _ cas ))~.
• Adding a wildcard symbol may retrieve word variants: (( aguas own sea transport signal 4 ) or ( guias ((d based) or (3 basel)) transfers _ cas ))*.