Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
author introduction » authors introduction, intro introduction, short introduction
technology author » technologies authors, technology methods, technology south
introduction ct » introduction co, introduction c2, introduction ch
development li » development lid, development lie, development lin
li afrique » l afrique, en afrique
ct data » act data, oct data, cost data

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

• Adding a wildcard symbol may retrieve word variants: technology author introduction ct data data communications costs _ development li afrique.*.