Perhaps you should try some spelling variations:
2.3 communication » 3.2 communication, de communication, 4 communication
developpement de » developpement des, developpement durable
technology trap » technology trade, technology tax, technology than
trap population » rural population, rapid population, boar population
4 developpement » de developpement, le developpement, et developpement
de fabrique » la fabrique, de l'afrique
prices 2.3 » price 2.3, prices 2.4, prices 2.1
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 trap population _ prices 2.3 communication costs 4 developpement de fabrique.*.