Perhaps you should try some spelling variations:
2.3.1.4 communication » 2.3.1.1 communication, 2.2.5.4 communication, 2.14 communication
population based » population age, simulation based, population data
developpement la » developpement de, developpement et, developpement du
technology trap » technology trade, technology tax, technology than
trap population » rural population, rapid population, boar population
4 developpement » de developpement, le developpement, et developpement
firm 2.3.1.4 » fig 2.3.1.4, firm 2.3.5
based firm » based firms, based fire, based farm
la farce » la force, la face, la france
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 based firm 2.3.1.4 communication costs 4 developpement la farce.*.