Perhaps you should try some spelling variations:
formal transport » informal transport, rural transport, modal transport
local transport » road transport, rural transport
costs chapter » cost chapter, courts chapter, posets chapter
transport en » transport et, transport can, transport _
langues et » langue et, algues et, langue en
vs formal » vs informal, its formal, _ formal
aguas vs » agens vs, aguas de, aguas do
et local » et locales, lent local, act local
en cas » un cas, en cause

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 vs formal transport costs chapter ) OR ( langues et local transport en cas ))~.
• Adding a wildcard symbol may retrieve word variants: (( aguas vs formal transport costs chapter ) or ( langues et local transport en cas ))*.