Perhaps you should try some spelling variations:
federal transfer » federal transfers, central transfers, fiscal transfer
causes transfers » cash transfers, asset transfers, based transfers
transfer fee » transfer fees, transfer der, transfer from
debt causes » debt crises
guias debt » guias de
a federal » _ federal
luis a » luis f, luis c
macao » macro, macau, cacao

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: (( luis a federal transfer fee macao ) OR ( guias debt causes transfers _ cao ))~.
• Adding a wildcard symbol may retrieve word variants: (( luis a federal transfer fee macao ) or ( guias debt causes transfers _ cao ))*.