Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
der communications » peru communications, do communications, border communications
del developpement » de developpement, des developpements, le developpement
developpement l » developpement il, developpement la, developpement de
costs del » costa del, costo del
l afrique » en afrique
social i » social _, social 4, social a
i grad » _ grad, a grad

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

• Adding a wildcard symbol may retrieve word variants: methods overview social i grad der communications costs del developpement l afrique.*.