Perhaps you should try some spelling variations:
1.1 communication » 4.1 communication, 1.3 communication, 1.4 communication
simulation state » simulation states, simulation stage, simulation system
cost development » cost developments, post development, port development
technology gaps » technology gap
gaps simulation » als simulation, baths simulation, data simulation
development en » developpement en, development menu, development eco
costs cost » costs cross, costs case, costs cash
space 1.1 » spaces 1.1, space 2.1, space 4.1

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

• Adding a wildcard symbol may retrieve word variants: technology gaps simulation state space 1.1 communication costs cost development en afrique.*.