Perhaps you should try some spelling variations:
13.3.9 communication » 13.3.10 communication, 13.4.5 communication, 3.3.2 communication
developpement de » developpement des, developpement durable
inflation goods » inflation good, inflation gross, information goods
a developpement » au developpement, de developpement, le developpement
technology has » technology hard, technology have, technology how
has inflation » how inflation, u.s inflation, cases inflation
prices 13.3.9 » prices 11.3.1, prices 14.3.4, prices 3.3.2
goods prices » goods services, gas prices
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 has inflation goods prices 13.3.9 communication costs a developpement de afrique.*.