Perhaps you should try some spelling variations:
insulation labour » insulation layer, regulation labor
study insulation » study population, sound insulation, study regulation
le developpement » de developpement, sme development
developpement de » developpement des, developpement durable
3 communication » 4 communication, de communication, data communication
labour prices » labour process, labor price, labour practices
de afrique » de l'afrique, en afrique, l afrique
prices 3 » prices _, prices a, prices 4
costs le » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology study insulation labour prices 3 communication costs le developpement de afrique.*.