Perhaps you should try some spelling variations:
tests information » costs information, gets information, testing information
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
technology tests » technology thesis, technology best, technology costs
information wage » information age, information war, information wants
developpement en » developpement et, developpement des, developpement de
4 developpement » de developpement, le developpement, et developpement
wage rate » wage rates
rate 3.1 » rate 3.10, rates 3.1, rate 3.4
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 tests information wage rate 3.1 communication costs 4 developpement en afrique.*.