Perhaps you should try some spelling variations:
integration wages » integration wage, integration wege, integration wie
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
21st integration » post integration, test integration, 2 integration
developpement en » developpement et, developpement des, developpement de
technology 21st » technology 2.1.1, technology 2.1.2, technology 2.1.3
wages trade » wages race, wharves trade, states trade
trade 6.2 » trade 2.2, trade 3.2, trade 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology 21st integration wages trade 6.2 communication costs _ developpement en afrique.*.