Perhaps you should try some spelling variations:
2.7 communication » 2.3 communication, 3.2 communication, 2 communication
technology trade » technology trends, technology transfer, technology transfers
developpement la » developpement de, developpement et, developpement du
trade sanctions » trade transactions
sanctions wages » sanctions case
4 developpement » de developpement, le developpement, et developpement
wages trade » wages race, wharves trade, states trade
la afrique » l afrique, la fabrique, en afrique
trade 2.7 » trade 2.2, trade 2.1, trade 4.7
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 trade sanctions wages trade 2.7 communication costs 4 developpement la afrique.*.