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
transfer der » transfer fees, transfer _
vs formal » vs informal, its formal, _ formal
changes a » changes _, changes 5, changes 3
agens vs » agens i, genes vs
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: (( agens vs formal transport costs chapter ) OR ( changes a social transfer der caso ))~.
• Adding a wildcard symbol may retrieve word variants: (( agens vs formal transport costs chapter ) or ( changes a social transfer der caso ))*.