Perhaps you should try some spelling variations:
formal transport » informal transport, rural transport, local transport
social transfer » social transfers
costs chapter » cost chapter, courts chapter, posets chapter
changes basic » changes asia, ranges basic, ganges basin
transfer der » transfer fees, transfer _
vs formal » vs informal, its formal, _ formal
aguas vs » agens vs, aguas de, aguas do
der caso » de caso, del caso, der cas

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 ( changes basic social transfer der caso ))~.
• Adding a wildcard symbol may retrieve word variants: (( aguas vs formal transport costs chapter ) or ( changes basic social transfer der caso ))*.