Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
3.1 communications » 3.1 communication, 4.1 communication, 1.1 communication
information warns » information wants, information war, information harness
rate information » trade information, care information, age information
developpement de » developpement des, developpement durable
technology rate » technology state, technology role, technology related
warns camps » war camps
de afrique » de l'afrique, en afrique, l afrique
camps 3.1 » camps 9.1, camps 3.4.1, camps 13.4

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

• Adding a wildcard symbol may retrieve word variants: technology rate information warns camps 3.1 communications costs _ developpement de afrique.*.