Perhaps you should try some spelling variations:
3.7 communication » 3.2 communication, 2.7 communication, 3.5 communication
developpement l » developpement il, developpement la, developpement de
technology 19 » technology 1, technology 10, technology 11
19 section » 10 section, 1930 section, 1949 section
two trade » tco trade, wto trade, do trade
trade 3.7 » trade 3.2, trade 3.1, trade 3.8
l afrique » en afrique

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

• Adding a wildcard symbol may retrieve word variants: technology 19 section two trade 3.7 communication costs _ developpement l afrique.*.