Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
simulation solution » formulation solution, simulation relation, simulation condition
state development » estate development, stable development, staff development
4 communications » 14 communications, 4 communication, 2 communications
technology 21st » technology 2.1.1, technology 2.1.2, technology 2.1.3
21st simulation » post simulation, test simulation, test simulations
solution five » solution film, solution iv, solution seven
development l » development li, development 1, development law
l afrique » en afrique
five 4 » five _, five 2, five a

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

• Adding a wildcard symbol may retrieve word variants: technology 21st simulation solution five 4 communications costs state development l afrique.*.