Perhaps you should try some spelling variations:
social transfer » social transfers
transfers costs » transfer costs, transfer cost, transfers foster
transfer der » transfer fees, transfer _
3 informal » _ informal, vs informal
costs chap » costs ch, costs chapter
langues et » langue et, algues et, langue en
et social » et sociales, 1 social, 11 social
der caso » de caso, del caso, der cas
aguas 3 » aguas de, aguas do

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 3 informal transfers costs chap ) OR ( langues et social transfer der caso ))~.
• Adding a wildcard symbol may retrieve word variants: (( aguas 3 informal transfers costs chap ) or ( langues et social transfer der caso ))*.