Perhaps you should try some spelling variations:
2.7 communication » 2.3 communication, 3.2 communication, 2 communication
des developpement » des developpements, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
technology test » technology best, technology mest, technology trust
test selection » host selection, test collection, self selection
selection wage » selection stage, selection based, selection chase
wage rate » wage rates
costs des » costs fees
rate 2.7 » rate 2.4, gate 2.7, rate 2.3

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

• Adding a wildcard symbol may retrieve word variants: technology test selection wage rate 2.7 communication costs des developpement en afrique.*.