Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
4 communications » 14 communications, 4 communication, 2 communications
developpement de » developpement des, developpement durable
technology how » technology 1, technology 2.2, technology 3
how inflation » low inflation, log inflation, has inflation
rate space » state space, trace space, safe space
de afrique » de l'afrique, en afrique, l afrique
space 4 » space _, space a, space 1

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

• Adding a wildcard symbol may retrieve word variants: technology how inflation rate space 4 communications costs _ developpement de afrique.*.