Perhaps you should try some spelling variations:
4.2.2 communication » 4.2.1 communication, 4.2.4 communication, 8.2.2 communication
education levels » education level
developpement de » developpement des, developpement durable
a developpement » au developpement, de developpement, le developpement
technology 10 » technology 110, technology 1, technology 11
levels prices » level price, cereals prices, metals prices
10 education » 1 education, 12 education, 2 education
prices 4.2.2 » prices 2.2.2, prices 4.3.2, prices 7.2.2
de afrique » de l'afrique, en afrique, l afrique
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology 10 education levels prices 4.2.2 communication costs a developpement de afrique.*.