Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
from communications » from communication, do communications, face communications
infection rates » inflation rates
rates secrets » masters secrets, trade secrets
developing l2 » developing _, developing a, developing e
4 developing » 3 developing
l2 afrique » l afrique, en afrique
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology _ infection rates secrets from communications costs 4 developing l2 afrique.*.