Perhaps you should try some spelling variations:
rural transport » road transport, rail transport
planning macro » planning matrix, planning major, planned macro
has transfer » gas transfer, cash transfer, heat transfer
transfer 4 » transfer _, transfer 3, transfer a
u.s debt » u.s debate
luis a » luis f, luis c

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: (( ((u.s debt) OR (its debt)) has transfer 4 acao ) OR ( luis a rural transport planning macro ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((u.s debt) OR (its debt)) has transfer 4 acao ) or ( luis a rural transport planning macro ))~".
• Adding a wildcard symbol may retrieve word variants: (( ((u.s debt) OR (its debt)) has transfer 4 acao ) or ( luis a rural transport planning macro ))*.