Perhaps you should try some spelling variations:
data transfer » cash transfer, heat transfer
peer transfer » der transfer, ee transfer, steuer transfer
transfer ein » transfers ein, transfer beim, transfer bei
system cas » system case, systems case, system class
system can » systems can, system change
aguas de » aguas del, aguas do, vagues de
de peer » de peter, der peer, die peer
ein cao » ein echo
de data » e data, wide data, de datos

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: (( aguas de peer transfer ein cao ) OR ( aguas de data transfer ((system cas) OR (system can)) ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( aguas de peer transfer ein cao ) or ( aguas de data transfer ((system cas) OR (system can)) ))~".
• Adding a wildcard symbol may retrieve word variants: (( aguas de peer transfer ein cao ) or ( aguas de data transfer ((system cas) OR (system can)) ))*.