Perhaps you should try some spelling variations:
transfer simulation » transfer simulations, transport simulation, transport simulations
simulation labour » simulation land, simulation laboratory
4 communication » 3 communication, 5.4 communication, de communication
labour prices » labour process, labor price, labour practices
4 developing » 3 developing
prices 4 » prices _, prices a, prices 3
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 transfer simulation labour prices 4 communication costs 4 developing _ afrique.*.