Perhaps you should try some spelling variations:
informal transfer » informal transfers, informal transport, information transfer
transfer systems » transport systems, transit systems
formal transfer » informal transfers, social transfer, fiscal transfer
transfer fee » transfer fees, transfer der, transfer from
de informal » do informal, _ informal, 3 informal
systems can » systems case
del formal » does formal, die formal, decile formal
aguas del » aguas do
aguas de » aguas do, vagues de, agua e
macao » macro, macau, cacao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( aguas de informal transfer systems can ) or ( aguas del formal transfer fee macao ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( aguas de informal transfer systems can ) OR ( aguas del formal transfer fee macao ))*.