Perhaps you should try some spelling variations:
system transformation » social transformation, die transformation, der transformation
transformation a » transformation _
transfers have » transfers made
des transfers » net transfers, cash transfers, arms transfers
lead system » leave system, road system, seed system
have macro » change macro

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: (( guias _ des transfers have macro ) OR ( guias lead system transformation a adocao ))~.
• Adding a wildcard symbol may retrieve word variants: (( guias _ des transfers have macro ) or ( guias lead system transformation a adocao ))*.