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 de » transfer der, transfer fee, transfer bei
vs formal » vs informal, its formal, _ formal
changes 3 » changes _, changes 5, changes 4
agens vs » agens i, genes vs
de caso » de casos, de cas, de castro

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 3 social transfer de caso ))~.
• Adding a wildcard symbol may retrieve word variants: (( agens vs formal transport costs chapter ) or ( changes 3 social transfer de caso ))*.