Perhaps you should try some spelling variations:
transfer insulation » transfer innovation, transfer simulation, transfer simulations
insulation wages » insulation case, insulation layer, insulation e2
developpement en » developpement et, developpement des, developpement de
1 communication » 10 communication, 3 communication, 4 communication
4 developpement » de developpement, le developpement, et developpement
wages race » wages trade, wage rate, wages case
costs 4 » costs _, costs a, costs 4.2
race 1 » race _, bace 1, rice 1

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

• Adding a wildcard symbol may retrieve word variants: technology transfer insulation wages race 1 communication costs 4 developpement en afrique.*.