Perhaps you should try some spelling variations:
developpement en » developpement et, developpement des, developpement de
de communication » mobile communication, online communication
4 developpement » de developpement, le developpement, et developpement
technology use » technology 1, technology 2.2, technology 3
valuation rate » valuation date, evaluation rates, valuation daten
use valuation » use evaluation, use evaluations, e valuation
rate east » rates east, trade east, state east
east de » least de, east side, east new
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 use valuation rate east de communication costs 4 developpement en afrique.*.