Perhaps you should try some spelling variations:
curve developpement » de developpement, le developpement, du developpement
data communication » data communications
communication wage » communications usage, communication what, communication package
information costs » information contents, information centers, information content
developpement en » developpement et, developpement des, developpement de
wage curve » age curve, damage curve, wage surveys
costs dhs » costs ch
dhs data » das data, hbs data, gas data

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information costs dhs data communication wage curve developpement en afrique.*.