Perhaps you should try some spelling variations:
case transfers » cash transfers, based transfers, cash transfer's
sea transport » road transport, bus transport
signal 4 » signal _, signal 3, signal a
signal 6 » signals 6, signal _, signal 3
own sea » own ses, own seed, own real
guias 3 » guias de
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 (signal 6)) ) OR ( guias 3 case transfers _ cas ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( aguas own sea transport ((signal 4) OR (signal 6)) ) or ( guias 3 case transfers _ cas ))~".
• Adding a wildcard symbol may retrieve word variants: (( aguas own sea transport ((signal 4) OR (signal 6)) ) or ( guias 3 case transfers _ cas ))*.