Perhaps you should try some spelling variations:
transport fuel » transport fares
sea transport » road transport, bus transport
fuel gas » fuel tax
de based » dge based, de base, code based
de bases » de base, de gases, les bases
areas a » areas _
a sea » _ sea, a set

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 a sea transport fuel gas ) OR ( guia ((de based) OR (de bases)) transfer _ a ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( areas a sea transport fuel gas ) or ( guia ((de based) OR (de bases)) transfer _ a ))~".
• Adding a wildcard symbol may retrieve word variants: (( areas a sea transport fuel gas ) or ( guia ((de based) OR (de bases)) transfer _ a ))*.